Answers To 2021-2022 Review HW For Electron Configuration And Periodic Table

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Here are the answer to 2021-2022 Review HW for Electron Configuration and Periodic Table.

1a) 3rd energy level

1b) 2 valence electrons (ve^-): electron configuration [Ne]3s²

2) [He]2s¹: 1ve^-

3) [Ne]3s²3p¹: 3ve^-

4) [He]2s²2p⁵: 7ve^-

5) [Ne]3s²3p⁴: 6ve^-

6) d-block and f-block elements