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

( 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 , PH ,  H2SO , 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

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 , PH ,  H2SO , 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

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 :

4   ,   NH ,   O ,   BF3   ,   CO ,   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 M’s solving rate.

3.9.a         Follow the instructions given by your teacher in order to check
m and m’s 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 & m’s experience picture.

( 10 points ).

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 ).

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