Atomic structure and the Periodic Table.pptx

Relationship between atomic structure and an atom

1. Atomic structure and the Periodic Table

2. Objectives Describe the structure of the atom (nucleus with protons/neutrons, electrons in shells). State relative charges & relative masses of subatomic particles.

3. We are made of-

4. See - Think - Wonder Look at the image displayed What do you see?   What do you think? What do you wonder?  

5. What are the particles inside the atom?

6. Representing atoms # of protons + # of neutrons # of protons

7. Determining the number of the subatomic particles in any atom Number of protons = Atomic number Number of electrons = Number of protons in an atom Number of neutrons = Mass number – Atomic number

8. Numericals Sodium has atomic mass 23, and atomic number 11. Calculate the number of protons, electrons and neutrons.

9. Numericals Sodium has atomic mass 23, and atomic number 11. Calculate the number of protons, electrons and neutrons. From the figure below, find the number of all the subatomic particles

10. Numericals Sodium has atomic mass 23, and atomic number 11. Calculate the number of protons, electrons and neutrons. From the figure below, find the number of all the subatomic particles Argon has 18 protons and 22 neutrons. Find the number of electrons in an atom of argon. What is argon’s atomic and mass number?

11. Element Number of protons Number of electrons Number of neutrons Atomic number Mass number 19 20 19 Cs 55 133 79 118 Mg 12 12

12. Electronic configuration Maximum electrons in a shell is given by the formula 2n 2 . Electrons are filled from lower shell to higher shell.

13. Using your copy of the periodic table, compare the electronic configuration of elements with their position in the periodic table. Work in pairs

14. Electronic configuration & the PT Group VIII noble gases have a full outer electron shell the number of outer shell electrons is equal to the group number in Groups I to VII the number of occupied electron shells is equal to the period number

15. Ions If an atom loses or gains electrons, it will become a positively or negatively charged particle, called an  ion, by losing or gaining electrons . 

16. Write the number of electrons, protons and neutrons in the following: (use the periodic table for the atomic number and atomic mass) Do you find anything peculiar from your calculations? Cl 1- Al 3+ N 3- Na + S 2- Ca 2+

17. Isotopes

18. Isotopes