Se muestran los artículos pertenecientes a Septiembre de 2016.

 This link will drive you directly to the 2ESO blog activities about eines TIC (Excel, Word, etc).  You can also find this blog in ENLACES section of this blog :





                     LESSON 1.  SECTION 1. (It matches lesson 7 of your textbook).

                                   CHEMICAL BOND. ELEMENT CLASSIFICATION.

 - Read here about periodic table’s history and how it was developed through several scientist’s work :


 - Elements classification : Metals, nonmetals and metalloids :


                                   (IONIC, COVALENT AND METALLIC BONDS).


             4. Covalent bond :

             5. Ionic versus covalent bond :



- If you have not understand yet what is the difference between an ionic and covalent bond, you have an easier videos here to get it !! :

              * Ionic bond :

              * Covalent bond :



- Teacher’s guide and subject program can be found here :



                                                                LESSON 1. SECTION 2.


- Why was Mendeleiev so famous , because of his periodic table? :


                                                                   OXIDATION NUMBERS (VALENCIA).

 - What a oxidation number is and what is used for? :

   3. Here you have a periodic table with the most important oxidation numbers :


    Oxidation numbers are used to formulate chemical compounds to obtain the compound formula, like NaCl or CaO, etc. See here how they are used :



                                                               LESSON 1 . SECTION 3.

                                                        Binary compounds formulation.

 - Look up the following links :

 3. You can check every oxid formula you want at the following web :


                                               Naming binary compounds. (NOMENCLATURE).

- Look up the next link in 1 and watch the videos in 2 and 3 :

- To name ionic compounds the next link can be useful :

- About Hydrides :

- L'enllaç és :



- Watch this video in order to practice how to make an electronic configuration :


- At the following webpage you can read, step by step, about how to write whatever electronic configuration of any element you want :


- Check here the names of each family from the periodic table :

 - And here you have another periodic table with family elements names including metalloids :

                                         Family elements names.


 - Videos sobre la tecnología :

                      1)  Què és la tecnología?  video 1.

                      2)  Què és la tecnología?  video 2.

- Videos sobre el procés tecnològic :

                       3) El procés tecnològic. video 0

                       4) El procés tecnològic. video 1

                       5) El procés tecnològic. video 2

- Aquí teniu un video de com uns alumnes d’un institut han fet un projecte seguint els passos que cal per tal de fer el procés tecnològic :

 - Un altre video interessant sobre què és la tecnología :

                                            * Què és tecnología.

 - I aquí un video sobre la historia de la tecnología :

                                         * Historia de la tecnología.

 - Per últim un video important sobre la relació entre la tecnologia i els nens :

                                      * Tecnología i els nens i nenes.


   Ara després de veure els videos, qui vulgui i li vingui de gust, pot escriure a la llibreta quin video li ha agradat més i perquè, i escriure a sota una petita frase amb quina creus tu que és la diferencia més important que hi ha entre tecnología i procés tecnològic.



                                                          ATOMIC NUMBER AND MASS NUMBER.

                       (Information got from

- Atomic number (Z) , the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing number of protons in the nucleus. Accordingly, the number of protons, which is always equal to the number of electrons in the neutral atom, is also the atomic number. An atom of iron has 26 protons in its nucleus; therefore the atomic number of iron is 26.

In the symbol representing a particular nuclear or atomic species, the atomic number may be indicated as a left subscript. 

Mass number (A) , in nuclear physics, the sum of the numbers of protons and neutrons present in the nucleus of an atom. The mass number is commonly cited in distinguishing among the isotopes of an element, all of which have the same atomic number (number of protons) and are represented by the same literal symbol; for example, the two best known isotopes of uranium (those with mass numbers 235 and 238) are designated uranium-235 (symbolized 235U) and uranium-238 (238U).


 - Do you really wanna know what an atomic orbital is?  so then come and check the next link and read it carefully at home !! :

                                                 *    WHAT AN ATOMIC ORBITAL REALLY IS !!

                                                 AUFBAU RULE

 - A very slow and nice video explaining all about orbitals, filling out orbitals with electrons and Hund and Pauli principles and rules :

                                                  * Video about orbitals and Hund and Pauli principles.

                                                  * PowerPoint about Hund and Pauli principles.

                                                  * Another video about Aufbau rule and Hund and Pauli principles.

                                                  * One more video about Pauli and Hund principles.


- Look this link up to know about polarity definition and which ones are the most common polar bonds and why :

                                                         * Polarity and polar bonds.

 - An interesting videos explaining what polar and nonpolar molecules are. It’s told in a fast english but if you watch it several times you will understand the basis of the explanations thanks to the images and drawings and outlines shown at the video :

                                                              * Polarity video.

                                                              * Polarity video 2.

                                                              * Polarity video 3.

 - Read and watch here about water polarity, one of the most important compounds on earth and chemistry :

                                                              * Read about water polarity.

                                                               *Water polarity video 0.

                                                               * Water polarity video 1.

                                                                * Water polarity video 2.


 - Consulteu aquí els següents links per diferenciar correctament la RAM de la ROM :



 - Veieu els següents videos i feu una taula identificant els diferents passos del procés tecnològic en cadascun :


  - Here you have tasks to do on guard on wednesday 21-9-16. (Aquí teniu la feina per a fer a la guardia de demà dimecres 21-9-16)

  * TASK 1 :  Finish your homework from the last class in case you have not finished yet.

  * TASK 2 :  Read the page 147 of your textbook and make later the exercice 1 and 2 from this page. (In order to this page read the article 58 of the bloc too).

  * TASK 3 :  Begin to do all the exercises of page 154 of your textbook, if you cannot finish them on guard class you will have to come them to an end at homework.


 - Exemple 1 to practice EXCEL for the first time :


- An empty periodic table to exercice by heart and remembering families and chemical elements :

 - English elements’ name :

Hydrogen, Lithium, sodium, potassium, rubidium, cesium, francium
Beryllium, magnesium, calcium, strontium, barium, radium
Boron, aluminum, gallium, indium, thallium
Carbon, silicon, germanium, tin, lead
nitrogen, phosphorus, arsenic, antimony, bismuth
oxygen, sulfur, selenium, tellurium, polonium
fluorine, chlorine, bromine, iodine, astatine
helium, neon, argón, krypton, xenón, radón
scandium, titanium, vanadium, chromium,manganese, iron, cobalt, nickel, copper, zinc
palladium, silver, cadmium, platinum, gold, mercury.


- Check the following links about how the atomic theory was developed and make a nice summary about it :

- If you need it, you have here a link about it in spanish :


 - In the following file you will find out different expressions to explain whatever you wanna say at your chemistry class :


- Today in class, while teacher is going around student’s tables in order to check your notebook and how you do your work in class, you will have to achieve the following exercices :

 1. Write and draw the Aufbau principle and the electronic configuration of Niquel. (when you are done then go to the article  52   and watch the video to check the answer).

 2. Visit the articles number  62 or 53  and observe the periodic tables that are posted there. Then look for 5 hard metalls with high density and another 5 soft metalls with low density. Write the density value in your notebook of each metall you choose and compare their properties.

 3. Do the exercices  19, 20, 21, 22, 24, 26, 28 and 30 from page 154 and 155 of your textbook.

 4. Read carefully the article number  63 ( atom model 1 )   because it is really well written and you can apreciate there the very significance that atom models development has had over the ages of science history. Read this carefully and write an overview about it in your notebook.

5. List the quantum numbers you know and explain what each indicates and means.  Write also which values each can get.