Name: _________________________ Period: _____ Date:_________________

Chemistry Practice Test: Unit 02: Energy, Matter, Atomic Structure, Electron Configuration

Complete the following questions by providing the chemical symbol and mass number in the corresponding spaces.

1. Identify the isotope with 44 protons and 57 neutrons. _________________________

2. Identify the isotope with 62 protons and 88 neutrons. _________________________

3. Identify the isotope with 96 protons and 151 neutrons. _________________________

Fill in the following table:

Isotope	Atomic Number	Mass Number	Number of Protons	Number of Neutrons	Number of Electrons
4.) ^10boron
5.) ^70gallium
6.) ^204thallium

For your use:

5p ___ ___ ___

4d ___ ___ ___ ___ ___

5s ___

4p ___ ___ ___

3d ___ ___ ___ ___ ___

4s ___

3p ___ ___ ___

3s ___

2p ___ ___ ___

2s ___

1s ___

7. Consider the elements oxygen, argon, and iodine. Which has ...

A. its highest energy level completely filled? _______________

B. the highest occupied energy level? _______________

C. four electrons in the 2p sublevel? _______________

8. What are the maximum number of electrons that can occupy the ...

A. second principal energy level? _______________

B. any p sublevel? _______________

C. any d sublevel? _______________

D. any f sublevel? _______________

9. Identify the elements with the following electron configurations:

A. 1s² 2s² 2p⁶ 3s² 3p⁴ _______________

B. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p² _______________

C. 1s² 2s² 2p⁶ _______________

D. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹ _______________

10. Write the condensed electron configuration for niobium. __________________________

11. Write the condensed electron configuration for indium. __________________________

12. Write the dot diagram for cesium. _______________

13. Write the dot diagram for thallium. _______________

14. Write the dot diagram for bismuth. _______________

Problems: Show all the work for the following problems, include units at the end of all numbers, and remember to report your final answer with the correct number of sig. figs.

15. There are two naturally occurring isotopes of antimony. The relative abundances of each are: ¹²¹Sb with a mass of 120.9038 amu, 57.21% and ¹²³Sb with a mass of 122.9042 amu, 42.79%. Calculate the average atomic mass of antimony.

Answer: _______________

c = ln E = hn c = 3.00 x 10¹⁰ cm/s h = 6.6262 x 10^-34 Joule-seconds

16. What is the frequency of light whose wavelength is 5.99 x 10^-6 cm?

Answer: _______________

17. What is the energy of a photon with a frequency of 3.41 x 10²⁸ /s?

Answer: _______________

Fill in the missing information for each atom or ion.

Symbol	Protons	Mass #	Charge	Electrons	Neutrons
18. 19. Cf				101	152
Os		190	+1

20. Draw an Aufbau Diagram for Carbon and then a picture of what its orbitals look like:

Fill in the following orbital notations using up and down arrows __ .

21. For the ion Ti²⁺

1s 2s2p 3s3p 4s 3d 4p

22. For the atom Cu

1s 2s2p 3s3p 4s 3d 4p

23. For the ion Al^2-

1s 2s2p 3s3p 4s 3d 4p

24. For the ion Mn¹⁺

1s 2s2p 3s3p 4s 3d 4p