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# 7.5: Worksheets for Chapter 7

Created by: CK-12

Copy and distribute the lesson worksheets. Ask students to complete the worksheets alone or in pairs as a review of lesson content.

## Orbital Configuration Worksheet

CK-12 Foundation Chemistry

Name_______________________ Date__________

Draw the Orbital Configuration for these Atoms
Symbol Orbital Diagram
Mg
P
Ge
Kr
O
F
Pb
Write the Electron Configuration Code for these Atoms
Atom Electron Configuration Code
V $1s^22s^22p^63s^23p^64s^23d^3$
Mg
P
Ge
Kr
O
F
Pb

## Quantum Numbers Worksheet

CK-12 Foundation Chemistry

Name______________________ Date_________

1. Which quantum number indicates the electron's energy level?
2. Which quantum number indicates the electron's sub-energy level?
3. Which quantum number indicates the electron's orbital within the sub-energy level?
4. Which quantum number indicates the electron's spin?
5. What is the lowest energy level that has a $d$ sub-level?
6. What is the total number of electrons that can exist in the $3^{rd}$ energy level?
7. Which sub-energy level is indicated by $\ell = 1$?
8. which sub-energy level is indicated by $\ell = 2$?
9. What is the maximum number of electrons that can be held in an $f$ sub-energy level?
10. What does it mean for an electron to be “excited”?
11. What are the $n$ and $\ell$ quantum numbers for the last electron in bromine?
12. What are the $n$ and $\ell$ quantum numbers for the last electron in iron?
13. What are the $n$ and $\ell$ quantum numbers for the electron in hydrogen?
14. The three electrons in the $2p$ sub-energy level of nitrogen have the $n$ and $\ell$ quantum numbers. What are the $m_ \ell$ quantum numbers for each of these three electrons?
15. What is the basic tenet of the quantum theory?
16. Why are the quantum numbers $n = 2, \ell = 2, m_\ell = 2, s = \frac{1}{2}$, not an acceptable set of quantum numbers for an electron?
17. Sketch a picture of the $2s$ sub-energy level showing any nodes present.
18. Give the full set of quantum numbers for each of the electrons in a helium atom.
19. What maximum number of electrons in an atom can have the quantum numbers $n = 2, \ell = 1$?
20. What maximum number of electrons in an atom can have the quantum numbers $n = 3, \ell = 3$?

## Electron Configuration Worksheet

CK-12 Foundation Chemistry

Name______________________ Date_________

1. Fill in the orbital electron representation for phosphorus.

2. Fill in the electron orbital configuration for cobalt.

3. Fill in the electron orbital configuration for bromine.

4. Draw the orbital representation for the electron configuration of calcium.

5. Write the electron configuration code for phosphorus.

6. How many valence electrons does phosphorus have?

7. Write the electron configuration code for cobalt.

8. How many valence electrons does cobalt have?

9. Write the electron configuration code for bromine.

10. How many valence electrons does bromine have?

11. Write the electron configuration code for calcium.

12. How many valence electrons does calcium have?

13. How many valence electrons does tellurium have?

14. What will be the outer energy level electron configuration for element #118?

15. Draw the orbital representation of the electron configuration for silicon.

16. How many valence electrons does silicon have?

## Electron Dot Formulas Worksheet

CK-12 Foundation Chemistry

Name______________________ Date_________

1. Draw the electron-dot formula for phosphorus.

2. Draw the electron-dot formula for bromine.

3. Draw the electron-dot formula for cobalt.

4. Draw the electron-dot formula for calcium.

5. Draw the electron-dot formula for silicon.

6. Draw the electron-dot formula for element #118.

• The worksheet answer keys are available upon request. Please send an email to teachers-requests@ck12.org to request the worksheet answer keys.

Aug 18, 2012

Jul 21, 2014