Question

state the electronic configuration
no.1 element with atomic no. 19
no.2 element with atomic no. 7
no.3 element with atomic no. 18
no.4 element with atomic no. 20
no.5 element with atomic no. 9
(only elements and just numbers like 2,8,8,2)​

Answer 1

1)1s²2s²2p⁶3s²3p⁶4s¹

2)1s²2s²2p³

3)1s²2s²2p⁶3s²3p⁶

4)1s²2s²2p⁶3s²3p⁶4s²

5)1s²2s²2p⁵

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