1. The law of conservation of mass states that:

2. Who was responsible for the Gold Foil Experiment
Who was responsible for the Gold Foil Experiment? What where the results of the experiment? What did he conclude based on his results?

3. The results were:
most of the radiation passed through
with little deflection
a small portion was deflected at wide
angles, including back at the source
of the radiation.

4. How many protons does the following atom have?

5. Which model of the atom did John Dalton create?

6. What are the main flaws with Dalton’s model of the atom?

7. What distinguishes isotopes of an element from one another?

8. Write the complete nuclear symbol for potassium ion with a +1 charge.

9. Calculate the average atomic mass of an element with the following isotopes: Element – 127 (67.02%) Element – 128 (25.67%) Element – 129 (7.31%)

10. Who was. responsible for the plum pudding model
Who was responsible for the plum pudding model? What experiment did he use to arrive at this model?

11. What experimental results led Thomson to
believe that Dalton’s model was incorrect?

12. Describe the Plum Pudding Model.

13. What was Max Planck’s view on
energy?
How was this different from the
previous view?
Who help prove Planck’s idea? How?

14. Explain the photoelectric effect.

15. What was Bohr’s model? How was it
different from Rutherford’s model?

16. Based on the Bohr model of the atom, explain
what happens to produced the yellow flame
when sodium chloride is put into the Bunsen
burner flame.

17. Write the :
orbital diagram for beryllium
electron configuration for iron
noble gas notation for platinum

18. What are the quantum numbers that describe
the last electron in the following and identify
the element (by name if possible) it describes:
4f8 2p3 1s1 5d8

19. If the first QN=3, what are the possible
values of the 2nd QN?
How many orbitals exist on the 3rd energy
level? How many electrons?
If l=3: what type of orbital? What are the possible values of the 3rd QN?