Lesson No. 1 BOHR MODEL OF THE ATOM.pptx

BOHR Model of the atom Slide Decks for NLC Grade 9 Consolidation

1. 1. According to Bohr’s atomic model, what is the structure called at the center of the atom? REVIEW NUCLEUS

2. 2. What are the particles inside the center called? REVIEW PROTONS & NEUTRONS

3. 3. What other particles are important in an atom and where are they located? REVIEW ELECTRONS, IN ORBITS KNOWN AS ENERGY SHELL AROUND THE NUCLEUS

4. Purpose of the Lesson About the model of the structure of the atom as described by Niels Bohr and the limits of that structure. The lesson may help you understand that scientists draw diagrams and use models to represent what cannot be seen with the naked eye.

5. Match the Words! ORBIT PROTON NEUTRON VALENCY The number of electrons that each atom needs to gain, lose or share to fill its outer shell A positively charged particle found in the nucleus of the atom The curved path a smaller object like an electron takes around another object in a nucleus A particle without charge found in the nucleus of the atom

6. THE BOHR MODEL OF AN ATOM OF CARBON (Read out the written text in the activity sheet provided to you)

7. How many protons are there in the diagram? What is the name of the particle labeled Y? How many are there in the diagram? What charge do they carry?

8. What is the name of the type of particle labeled Z, and why are there the same number as there are protons in the diagram, and what charge do they carry?

9. Bohr based his theories of the structure of an atom on two other scientists. Name the two scientists. Rutherford & Max Planck

10. What is the electron configuration for an atom of Carbon? 1s 2 2s 2 2p 4

11. Why is the structure of the atom so important in chemistry? The structure of the atom is important in Chemistry because the electrons in the outer shell of an atom (the valence electrons) are the electrons that form bonds with other atoms and take part in a chemical reaction between atoms of elements and compounds.

12. Has this lesson helped you to better understand what an atom is? If so, how? Which questions were easy to answer – the ones in Component 4B or Component 4C? Why?