Question

Pls tell me 1-18 elements sub shell and main shell. [i want it because i want check my answers are correct or not so pls dont spam]
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Answer 1

Answer:

H=k she'll /1s¹

He =k/ 1s²

Li=k,l/1s² 2s¹

Be=k, l/1s² 2s²

B=K, L/1s² 2s² 2p³

C=K L/1s² 2s² 2p⁴

N=k l/1s² 2s² 2p5

O=K L/ 1s² 2s²26