7th GRADE SCIENCE.

7th GRADE SCIENCE : Article 39 : Multiple bonds in molecules. Single, double and triple bonds. Bonding energy.

easyfisquim - 12 de marzo de 2018 - 06:41 - 7th GRADE SCIENCE.

( 3/12/18 Monday )

* Activity : No school. Snow day.

( 3/13/18 Tuesday )

* Activity 3.33 : Reviewing Photosynthesis and endothermic reactions.

Multiple bonds in molecules, kind of types.

3.33.a Check the following papers in order to remember the main issues

about Photosynthesis, answer the questions and copy the drawing.

Page 1

Page 2

Page 3

( 10 points ).

3.33.b Read the information given about the different types of bonds you

can find within a molecule. Answer the suggested questions based

on the text you have just read and try to represent the main sort of

them by drawing at molecules given.

Page 1

Page 2

( 10 points ).

3.33.c Read also now the information given about the different types of

bonds you can find within a molecule. Then indicate the different

kind of bonds you find at the given molecules using arrows and

distinguise them.

Page 1

Page 2

( 10 points ).

( 3/14/18 Wednesday )

* Activity 3.34 : Showing multiple bonds within molecules. Poster.

3.34.a Make the poster as the examples given.

Picture 1

Picture 2

Picture 3

( 10 points ).

( 3/15/18 Thursday )

* Activity 3.35 : Energy within multiple bonds.

3.35.a Identify the multiple bonds at the following molecules and

organize them accordint their corresponding bonding energy.

Page 1

Page 2

( 10 points ).

3.35.b Copy the information from the whiteboard related to multiple bonds

energy and classify the compunds given from highest to lowest

energy amount.

Whiteboard to copy about multiple bonds energy.

Page 1

Page 2

( 10 points ).

3.35.c Read the information give about how to build a multiple bond and

do it using oxygen atoms as a starting point.

Page 1

Page 2

( 10 points ).

( 3/16/18 Friday )

* Activity 3.36 : Importance of chemistry and chemical reactions in our everyday life.

3.36.a Check the following link and identify the different processes that

happen around you at your everyday life. Make a table and write

down the most important about each one.

Look for another proccesses that may happen around you everyday

and could be indentify as chemical reactions, like starting a car,

baking bread for breakfast, frying eggs for your meal, washing your

clothes, painting your nails, etc.

Examples of chemical reactions in everyday life.

Papers to work :

Page 1

Page 2

Page 3

Page 4

( 10 points ).

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7th GRADE SCIENCE : Article 38 : Energy involved in chemical reactions.

easyfisquim - 05 de marzo de 2018 - 12:53 - 7th GRADE SCIENCE.

( 3/5/18 Monday )

* Activity 3.28 : Using atoms sizes by yourself and preparing molecules and reactions.

3.28.a Use the materials given to achieve the suggested molecules and

reactions.

Picture 1 about building molecules and reactions.

Picture 2

Picture 3

Picture 4

Paper for checking the atoms sizes in order to build the molecules.

( 10 points ).

( 3/6/18 Tuesday )

* Activity 3.29 : Energy within chemical reactions. Endothermic and exothermic ones.

3.29.a Endothermic and exothermic reaction definition.

Whiteboard pic to copy.

Paper 1

( 10 points ).

3.29.b Heat and energy in chemical reactions. Classifying.

Paper 1

Paper 2

( 10 points ).

3.29.c Photosynthesis and another examples of energy in chemical reactions.

Paper 1

Paper 2

( 10 points ).

( 3/7/18 Wednesday )

* Activity 3.30 : Energy diagram for exothermic reactions and activation energy.

3.30.a Build the poster related to Activation energy involved in exothermic

reactions.

POSTER TO BE MADE.

( 20 points ).

( 3/8/18 Thursday )

* Activity 3.31 : Reviewing Activation energy. Endothermic reactions. Photosynthesis.

3.31.a Read the text given about the activation energy involved within

exothermic reactions and answer the questions.

Text to read page 1.

Text to read page 2.

( 10 points ).

3.31.b Read this text about Photosynthesis and endothermic reactions and

answer que suggested questions about it.

Page 1

Page 2

Page 3

( 10 points ).

3.31.c Check this drawing about Photosynthesis and put the given words

and expressions at the proper gaps on it.

Drawing to complet.

Photosynthesis drawing to look up 1

Photosynthesis drawing with the related chemical equation to look up 2

( 10 points ).

( 3/9/18 Friday )

* Activity 3.32 : Reviewing Photosynthesis and endothermic reactions.

3.32.a Copy the following Photosynthesis definition from the whiteboard.

Whiteboard Photosynthesis pic.

Paper to copy the whiteboard if you cannot see it.

Paper to copy the whiteboard, activity 1.

Papers back with act.2. Drawing campfire indicating the heat and released energy.

( 10 points ).

3.32.b Word search about Photosynthesis and activation energy.

Word search.

( 10 points ).

3.32.c Look at the following processes and at the back of the paper make

a table and organize them according to if they are exothermic or

endothermic processes. I remind you that exothermic processes

release or give off energy and endothermic ones absorb it.

Paper with processes to organize.

( 10 points ).

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7th GRADE SCIENCE : Article 37 : Putting atoms together to get molecules. Understanding chemical reactions.

easyfisquim - 26 de febrero de 2018 - 00:14 - 7th GRADE SCIENCE.

( 2/26/18 Monday )

* Activity 3.23 : Chemistry test and building molecules.

3.23.a First of all we do this test about the contents studied the last weeks.

Test page 1

Test page 2

Test page 3

Test page 4

Test page 5

Test page 6

Test page 7

Test page 8

Test page 9

Test page 10

Test page 11

Test page 12

( 10 points ).

3.23.b Choose one of the molecules shown at the whiteboard and using

the colored papers given build it and paste it at the background.

Picture 1 about molecules to build.

Picture 2 about molecules to build.

Picture 3 about molecules to build.

Picture 4 about molecules to build.

Picture 5 about molecules to build.

( 10 points ).

( 2/27/18 Tuesday )

* Activity 3.24 : Chemical reaction and rearrangement of atoms.

3.24.a Check the following poster shown in class and make the same with

the materials given in order to show how atoms rearrange when

are involved in a chemical reaction.

Poster example shown to build 1.

Poster example shown to build 2.

( 10 points ).

( 2/28/18 Wednesday )

* Activity 3.25 : Reviewing Lavoisier´s law and atoms´s features at the periodic table.

3.25.a Answer the questions and resolve the activities given at the papers

given to you :

Periodic table to use and check for resolving the activities.

Page 1 to work with activity 1

Page 2 to work with activity 1

Page 1 to work with activity 2

Page 2 to work with activity 2

( 10 points ).

3.25.b Read the following text about food and chemistry and when finish

reading it, read it at least 3 times please, answer the suggested

questions and write a proper and nice summary :

Text to read and questions and activities to do.

( 10 points ).

( 3/1/18 Thursday )

* Activity 3.26 : Energy within chemical reactions and ATOMS´size.

3.26.a Look at the suggested activities at the following two papers given

and answer the questions and use the new vocabulary properly.

Whiteboard´s pic with ENERGY within chemical reactions.

Activity 1, page 1.

Activity 1, page 2.

Activity 2, page 1.

Activity 2, page 2.

( 10 points ).

3.26.b At the back of the given paper you can check atoms´size and how they

change in size when you go both along and up and down from the

periodic table of elements. Check this information then, and do the

suggested activities and answer the questions :

Atoms size to check.

Activity 3, page 1.

Activity 3, page 2.

( 10 points ).

( 3/2/18 Friday )

* Activity 3.27 : Activities to review vocabulary about atoms, reactions and energy

in chemical reactions.

3.27.a Word search.

Word search.

Word search solution.

( 10 points ).

3.27.b Unscrambling words.

Unscrambling activity page 1.

Unscrambling activity page 2.

Unscrambling activitys solution page 1.

Unscrambling activitys solution page 2.

( 10 points ).

3.27.c Reading about energy, matter and reactions.

Reading text and questions page 1.

Reading text and questions page 2.

Reading text and questions page 3.

( 10 points ).

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7th GRADE SCIENCE : Article 36 : Types of chemical reactions and conservation of mass.

easyfisquim - 22 de febrero de 2018 - 16:32 - 7th GRADE SCIENCE.

( 2/20/18 Tuesday )

* Activity 3.20 : Checking atom number and conservation of mass in chemical equations.

3.20.a Check if the following chemical equations are true or false counting

the number of atoms from reactants to products in order to see if

the number of atoms remain the same.

Paper 1

Paper 2

Paper 3

Paper 4

( 10 points ).

3.20.b Check at the following activity if the Lavoisiers law is accomplished

at each of the chemical reactions equations given :

Paper 1

Paper 2

Paper 3

Paper 4

( 10 points ).

( 2/21/18 Wednesday )

* Activity : Field trip to Gattytown.

( 2/22/18 Thursday )

* Activity 3.21 : Achieving different kind of chemical reactions. Oxidation and precipi-

tation ones.

3.21.a Follow your teachers directions in order to check the paperclips

oxidation using a copper solution and the precipitation reaction of the

copper ( blue solid goes down) using a baking soda solution.

Video about chemical reactions carrying out today in the lab.

Picture about the oxidation reaction done today.

Materials given :

- Reaction 1 : Oxidation reaction.

Copper sulfate water solution, salt water solution,

Iron paperclip, eyedropper, small glasses.

- Reaction 2 : Precipitation reaction.

Copper sulfate water solution, Baking soda water

solution, eyedropper, plastic spoon, small glasses.

( 10 points ).

( 2/23/18 Friday )

* Activity 3.22 : Reviewing atoms and molecules.

3.22.a Make the following posters and wordings on your coloured papers

given.

Paper 1

Paper 2

Paper 3

Paper 4

Paper 5

Paper 6

Paper 7

( 10 points ).

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7th GRADE SCIENCE : Article 35 : Chemical reactions examples and Lavoisier's law about conservation of mass.

easyfisquim - 09 de febrero de 2018 - 16:05 - 7th GRADE SCIENCE.

( 2/12/18 Monday )

* Activity 3.15 : Chemical reactions and conservation of mass law.

LAVOISIERS LAW

ABOUT CONSERVATION OF MASS

WITHIN CHEMICAL REACTIONS.

3.15.a LAVOISIERS LAW , conservation of mass :

The Law of Conservation of Mass (or Matter) in a chemical reaction can be stated thus:

In a chemical reaction, matter is neither created nor destroyed, it only can be transferred or transformed.

It was discovered by Antoine Laurent Lavoisier (1743-94) about 1785. However, philosophical speculation and even some quantitative experimentation preceeded him. In addition, he was certainly not the first to accept this law as true or to teach it, but he is credited as its discoverer.

- After this, do the experience about acetone ans expanded polystirene

your teacher tells you about and follow his instructions.

( You will see how nothing happens when you place a piece of expanded

polystirene on water, but when placed on acetone it dissapears very

quick. But the issue is, is it a chemical reaction or only a physical

change? ).

PICTURE 1

PICTURE 2

PICTURE 3

( 10 points ).

3.15.b Once youve finished doing the experience fill out the paper given

in order to answet the questions :

PAGE 1

PAGE 2

( 10 points ).

3.15. Word search for remembering the vocabulary about chemical

reactions, periodic table and atoms structure :

WORD SEARCH

( 10 points ).

( 2/13/18 Tuesday )

* Activity 3.16 : Reviewing chemical reactions vocabulary.

3.16.a LAVOISIERS LAW , atoms and chemical reaction vocabulary.

Reviewing activity :

Paper work 1 (Word search)

Paper work 2 (Table of elements)

Paper work 3 ( Table of elements template)

Paper work 4 (Questions and vocabulary 1)

Paper work 5 (Questions and vocabulary 2)

( 10 points ).

( 2/14/18 Wednesday )

* Activity 3.17 : Chemical reactions using acids and other substances, about mixing

milk with alcohol, vinegar and lemon juice.

3.17.a Chemical reactions with acids. Milk, alcohol, vinegar and lemon juice :

Picture 1

Picture 2

Picture 3

Picture 4

Picture 5

When finishing making the experiments, write down on the given piece

of paper the results obtained during the performance of the

experiences. Dont forget to make a drawing about the 3 glasses with

the substances appeared.

( 10 points ).

( 2/15/18 Thursday )

* Activity 3.18 : Chemical reaction report about the experiments done yesterday

using milk, different kind of acids and alcohol.

3.18.a Answer the different questions at the following chemical report :

Page 1 Report

Page 2 Report

( 10 points ).

3.18.b Combustion reaction :

Watch the combustion reaction shown by your teacher and after that

fill out the given paper and copy the chemical reactions structure :

WHITEBOARD TO CHECK

Page 1 Combustion reaction

Page 2 Combustion reaction

( 10 points ).

3.18.c Draw the requested atoms structures at the given paper :

Given paper for drawing carbon and silicon atoms structure 1.

Given paper for drawgin carbon and silicon atoms structure 2.

( 10 points ).

( 2/16/18 Friday )

* Activity 3.19 : Combustion and flame.

3.19.a Check the following LINK to learn about different types of combustion

and the flames structure.

After checking the link, answer these questions :

a) How would you explain what a combustion reaction is?

b) How many types of combustion can you list?

c) What does smouldering consist of?

d) Explain the most important about rapid combustion.

e) On a piece of paper draw a flames parts and explain its structure and

where the temperature is higher.

f) What is fuel?

( 10 points ).

3.19.b Watch the following VIDEOS about the combustion reactions and when

finished write a little summary about the most important you saw.

Video 1 about what combustion is.

Video 2 about complete and incomplete combustion.

( 10 points ).

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7th GRADE SCIENCE : Article 35 : PERIODIC TABLE OF ELEMENTS PARTS.

easyfisquim - 05 de febrero de 2018 - 12:22 - 7th GRADE SCIENCE.

( 2/5/18 Monday )

* Activity 3.10 : Periodic table of chemical elements and atoms.

PERIODIC TABLE OF ELEMENTS.

3.10.a Checking elements from the periodic table of elements :

At the following periodic table of elements you can check its different

parts and how chemical symbols and elements are organized depending

on its chemical features. Check it in order to achieve questions and

activities shown at task page A :

TASK PAGE A

PERIODIC TABLE OF ELEMENTS TO LOOK UP

GROUPS AT THE PERIODIC TABLE OF ELEMENTS

( 10 points ).

( 2/6/18 Tuesday )

* Activity 3.11 : Elements and atoms names and organization within periodic table

of elements.

3.11.a Checking elements from the periodic table of elements :

At the following periodic table of elements you can check its different

parts and how chemical symbols and elements are organized depending

on its chemical features. Check it in order to achieve questions and

activities shown at tasks pages B, C and D :

TABLE 1

TABLE 2

PERIODIC TABLE OF ELEMENTS TO LOOK UP

GROUPS AT THE PERIODIC TABLE OF ELEMENTS

TASK PAGE B

TASK PAGE C

( 10 points ).

3.11.b Open the following link about an empty periodic table of elements and

fill out the gaps given with the chemical element symbol, atomic

number and the name of the element :

TASK PAGE D

TASK PAGE E

PERIODIC TABLE OF ELEMENTS TO LOOK UP

( 10 points ).

( 2/7/18 Wednesday )

* Activity 3.12 : Elements and atoms names and organization within periodic table

of elements.

3.12.a Use the materials given by your teacher to build an atom as the model

shown by your teacher, in order to form a similar atom with

all its protons inside an its electrons outside surrounding it.

Follow the instructions given by your teacher in order to choose one

element from the periodic table of elements to build your atom model.

Picture 1 about building an atom model.

Picture 2 about building an atom model.

Picture 3 about building an atom model.

Picture 4 about building an atom model.

Paperwork 1 to do

Paperwork 2 to do

> Links to check for learning more about atomic number :

- Atomic number, protons and electrons into the nucleus :

LINK 1

LINK 2

LINK 3

PICTURE 1

PICTURE 2

PICTURE 3

( 25 points ).

( 2/8/18 Thursday )

* Activity 3.13 : Checking different reactions to be done. Categories for realizing

that a chemical change or reaction is ocurring.

3.13.a Follow the instructions given by your teacher in order to perform the

different reactions and physical changes suggested by your teacher.

Treat the material and follow the procedures as told by your teacher.

Reaction 1 : Calcium carbonate (baking soda) with vinegar :

Foam is formed and CO2 gas is released.

PICTURE 1.1

PICTURE 1.2

PICTURE 1.3

PICTURE 1.4

Reaction 2 : Shaving foam with iodine and hydrogen peroxide.

First red color is got and when hydrogen peroxide is

added white color gets back.

PICTURE 2.1

PICTURE 2.2

PICTURE 2.3

Reaction 3 : Comparing a piece of potato into water that a piece of

potato into hydrogen peroxide. Hydrogen gas is

released.

PICTURE 3.1

PICTURE 3.2

PICTURE 3.3

Paper work 1 for answering questions.

Paper work 2 for answering questions.

Paper work 3 for answering questions.

( 10 points ).

( 2/9/18 Friday )

* Activity 3.14 : Reviewing data about chemical reactions.

3.14.a Writing down data and information about chemical reactions done :

Paper work 1 for answering questions.

Paper work 2 for answering questions.

Paper work 3 for answering questions.

( 10 points ).

3.14.a To remember the atoms structure and its relation to the periodic

table of elements copy the following outline at the given paper :

ATOM'S STRUCTURE OUTLINE.

( 10 points ).

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7th GRADE SCIENCE : Article 34 : Elements and atoms from periodic table of elements.

easyfisquim - 26 de enero de 2018 - 16:06 - 7th GRADE SCIENCE.

( 1/29/18 Monday )

* Activity 3.5 : Periodic table of chemical elements and atoms.

PERIODIC TABLE OF ELEMENTS.

3.5.a Checking elements from periodic table of elements :

a) Open a google docs and name the following elements symbols :

V , Cr , O , K , Na , Fe , Ti , Si , P , S , H , Be , Cl , F , He , Li , Au , Hg ,

B , Al , Ag , Tl and As

b) Name the elements put together within the following molecules and chemical compounds :

NH3 , H2O , SO2 , PH₃ , H₂SO₄ , O2 , C₂H₂, CH₄

Periodic table of elements.

( 10 points ).

( 1/30/18 Tuesday )

* Activity 3.6 : Periodic table of chemical elements properties.

ATOMS SHAPE AND SIZE.

3.6.a Look up this LINKS about how atoms size changes within the periodic

table of elements : LINK1 LINK2 ATOMS SIZES

a) Open a google docs and explain how atoms size changes within the

periodic table of elements :

b) At the same google docs file say where are the biggest atoms

at the periodic table of elements located and where are the smallest.

Tell, at least, 3 of the biggest atoms and 3 of the smallest atoms

at the periodic table of elements.

( 10 points ).

3.6.b Checking ATOMS SIZE from periodic table of elements:

a) Open a google docs and order the following elements in order from

biggest to smallest :

F, Br, At, I , Cl

Rb, Ce, H , Na, Li, K , Fr

Mg, Si, P ,Na, Cl, Ar, Al, S

b) Check the following compounds and say which atoms within the

molecule are bigger or smaller :

NH3 , H2O , SO2 , PH₃ , H₂SO₄ , O2 , C₂H₂, CH₄

( 10 points ).

( 1/31/18 Wednesday )

* Activity 3.7 : Single atoms agains molecules.

3.7.a a) Try to draw the following molecules using the "insert shape tool" at

google docs file.

Look up the EXAMPLE GIVEN in order to see how to do it.

-When drawing molecules,

check this link to use proper size for each atom

and for the names of the atoms check this one .

- Evaluation :

When finished, check the given links in order to see if you did it right

and if you drew the molecules with proper atoms sizes and geometry.

LINK 1 TO CHECK ( Go to the launch activity at the bottom ).

LINK 2 TO CHECK if you drew them in the right way.

Once you finish the 3.7.a activity send me your google docs file ( 10 points ).

( 2/1/18 Thursday )

* Activity 3.8 : Organizing atoms within molecules.

3.8.a a) Look at these 6 molecules and their main features :

CH4 , NH3 , O2 , BF3 , CO2 , H2O

Then, open a google docs and create a table like this to indicate :

-How many atoms each molecule has.

-How many atoms of each kind are within the molecule.

-The names of each different atom within the molecule.

-Which is the biggest and the smallest atom within the molecule.

-Tell 3 main features about each molecule.

( If needed, you can check here atoms sizes ).

( If needed, you can check here atoms names ).

Once you finish the 3.7.b activity send me your google docs file ( 10 points ).

3.8.b Faster finishers :

Extra work in case you finished activities 3.7.a and 3.7.b.

Check this LINK and summarize, using a google docs file, the main

differences between water molecule H2O and peroxide water

molecule H2O2.

- Why do you think then H2O2 is more powerful when cleaning and

treating wounds than only water H2O ?

Once you finish the 3.7.c activity send me your google docs file ( 10 points ).

( 2/2/18 Friday )

* Activity 3.9 : TCT activity (2) and Periodic table of chemical elements properties.

M and Ms solving rate.

3.9.a Follow the instructions given by your teacher in order to check

m and ms solving rate in both cold and hot water. When the

experience is finished please fill out the paper given and answer the

questions suggested in Part A and B from the whiteboard :

m & ms experience picture.

( 10 points ).

3.9.b Answer these questions about the periodic table of elements :

a) What is the periodic table of elements?

b) Who did the periodic table of elements?

c) Why and what is the periodic table of elements useful for?

Check this1 and this2

( 10 points ).

0 comentarios

7th GRADE SCIENCE : Article 33 : New ways to get energy.

easyfisquim - 22 de enero de 2018 - 12:02 - 7th GRADE SCIENCE.

( 1/22/18 Monday )

* Activity 2.44 : New ways to get energy and new ways to work out WORK.

NEW WAYS TO GET ENERGY.

2.44.a Formulas for working out work, second part :

Equations to use.

File 1

File 2

( 10 points ).

2.44.b New ways to get energy. Read the text and answer the questions :

Page 1

Page 2

( 10 points ).

( 1/23/18 Tuesday )

* Activity 3.1 : Chemistry and physics.

LESSON 3 : CHEMISTRY.

3.1.a What is chemistry and physics in science :

DONT COPY AND PASTE ANYTHING, WRITE THE ANSWERS USING

YOUR OWN WORDS.

a) Both chemistry and physics study matter. What is matter and what

is it characterized for?. Check LINK A and write in a doc file what

matter is and what mass and volumen are too. Paste pics.

LINK A

b) What is chemistry and what is physics?. Check link A to find out

and write the answer in a doc file.

Chemistry is ...

Physics is ...

b) In order to understand Physics and chemistry is important to check

what chemical and physical changes are. Check the LINK B and write

the difference between a chemical and a physical change. Paste a pic

for each sort of change too.

LINK C

( 10 points ).

3.1.b Watch the following video about what chemistry is and write a

short summary in a doc file.

Chemistry video

( 10 points ).

( 1/24/18 Wednesday )

* Activity 3.2 : Chemical reactions.

3.2.a What a chemical reaction is :

DONT COPY AND PASTE ANYTHING, WRITE THE ANSWERS USING

YOUR OWN WORDS.

a) When do we have a chemical reaction?

To answer the question check this LINK.

b) What is a molecule and why do they have bonds?

Why are molecules important in order to understand a

chemical reaction?

To answer these questions check this LINK.

c) What a chemical bond is?

Why are chemical bonds important to understand what is

happening when chemical reaction is ocurring?

To answer these questions check this LINK.

( 10 points ).

3.2.b Understanding chemical reactions :

Check these reactions at the video. After watching them explain in a

google doc whats happening and what the given reactions are.

Can you maybe now explain why they are chemical reactions?

VIDEO WITH CHEMICAL REACTION

( 10 points ).

( 1/25/18 Thursday )

* Activity 3.3 : Atoms redistribution when having a chemical reaction.

3.3.a Chemical reaction and atoms :

a) Copy this poster about atoms and reactions :

PICTURE 1.

b) Copy this poster about reaction parts and molecules :

PICTURE 2.

c) What a Here you have the whole thing about atoms, molecules and

reaction :

PICTURE 3.

( 10 points ).

( 1/26/18 Friday )

* Activity 3.4 : Molecules and atoms.

3.4.a Counting atoms into a molecule :

Go to the following LINK and check it. Answer the following questions in

a google doc :

a) What is a molecule ?

b) Write 3 molecules and their names.

c) What is the difference between a molecule and a simple atom?

d) What is the relationship between a molecule and a compound?

e) What is carbon dioxide?

Write its formula and the shape of the molecule and the most

interesting you find about it at the link that talks about this compound

and molecule. Make a draw of this molecule.

( 10 points ).

3.4.b Molecules with two atoms :

Go to this LINK and check the information given about this kind of molecules formed by two atoms :

a) What is a diatomic molecule?

b) What is the difference between a mononuclear diatomic

molecule and a heteronuclear diatomic molecule?

c) How many atoms does a diatomic molecule always have?

d) Go to this WEB and write the names of the following elements

and atoms. Look for them at the periodic table of elements :

CO
NO
MgO
HCl
KBr
HF
SiO

Hydrogen (H₂)
Nitrogen (N₂)
Oxygen (O₂)
Fluorine (F₂)
Chlorine (Cl₂)
Iodine (I₂)
Bromine (Br₂)

( 10 points ).

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