NLC Consolidation Camp Science 9 Lesson 1. The Bohr Model.pptx

NLC - Consolidation Camp
Science 9 - Lesson 1
Bohr Atomic Model

1. LESSON 1. BOHR ATOMIC MODEL LIRA JEAN T. PAGADUAN MARC YSRAEL B. BERNOS MEMORIAL NATIONAL HIGH SCHOOL

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

3. REVIEW What are the particles inside the center called?

4. REVIEW What other particles are important in an atom and where are they located?

5. LESSON Purpose This lesson is about a model of the structure of the atom as described by Niels Bohr and the limits of that structure. The lesson may also help you to understand that scientists sometimes draw diagrams and use models to represent what cannot be seen with the naked eye.

6. Lesson Language Practice Match each scientific term with its correct definition by drawing a line to connect their boxes.

7. Lesson Activity The main lesson stimulus includes symbolic representations of the structure of atoms as well as two short paragraphs of text.

8. Lesson Activity Jose is in Grade 9. One day he said to his parents that his teacher had been talking about the structure of the atom in class, so he decided to research what he could find out for himself. He put together the following paragraph from several sources.

9. Lesson Activity Niels Bohr In 1913, Niels Bohr proposed a model for the structure of an atom based on the work of Ernest Rutherford about the nucleus of atoms and Max Planck’s quantum theory. Bohr suggested that the central heavy positive nucleus contains protons and neutrons and that the negatively charged electrons moved around the nucleus in circular paths called orbits. Although Bohr’s model is inaccurate in terms of the electron energy levels or shells it is still used today as an introduction to the Atomic Theory. The Quantum Mechanical Model of the Atom is currently accepted as more accurate. The symbols used in chemistry for the subatomic particles are neutrons n o , protons p + , electrons e - .

10. Lesson Activity How many protons are there in the diagram? 6 Protons

11. Lesson Activity What is the name of the type of particle labeled Y, and how many are there in the diagram and what charge do they carry?

12. Lesson Activity 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?

13. Lesson Activity Bohr based his theories of the structure of an atom on two other scientists. Name the two scientists. Ernest Rutherford and Max Planck

14. Lesson Activity What is the electron configuration for an atom of Carbon? 1s 2 2s 2 2p 2

15. Lesson Activity Why is the structure of the atom so important in chemistry?

16. CONCLUSION Has this lesson helped you to better understand what an atom is? If so, how?