Answer To Electron Configuration Homework

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*1s² 2s² 2p⁶ 3s² 3p⁶ 4s

Answers are in the form {Element symbol(s), # of electrons}, Electron configuration, (# of valence electron)
1. (Be 4e^-) 1s² 2s² [2 valence electrons]

2. (Al 13e^-) 1s² 2s² 2p⁶ 3s² 3p_x¹ 3p_y⁰ 3p_z⁰ [ 3 valence electrons]

3. (Na 11e^-) 1s² 2s² 2p⁶ 3s¹ [ 1 valence electron]

4. (Ar 18e^-) 1s² 2s² 2p⁶ 3s² 3p_x² 3p_y² 3p_z² [ 8 valence electrons]

5. (Ca 20e^-) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² [ 2 valence electrons]

6. (O 8e^-) 1s² 2s² 2p_x² 2p_y¹ 2p_z¹ [6 valence electrons]

7. (Ra 88e^-) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶ 7s² [2 valence electrons]

8. (Pb 82e^-) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p_x¹ 6p_y¹ 6p_z⁰ [4 valence electron]

9. (Zn 30e^-) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d² 3d² 3d² 3d² 3d²[NA valence electron]

10. (Fe 26e^-) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d² 3d¹ 3d¹ 3d¹ 3d¹[NA valence electrons]

# of valence electrons
1. 2ve^-
2. 3ve^-
3. 1ve^-
4. 8ve^-
5. 2ve^-
6. 6ve^-
7. 2ve^-
8. 4ve^-
9. NA
10. NA