Chemistry, asked by niki9513, 1 year ago

tell...............

...

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Answered by dips05

2

Answer:

Li: 1s2 2s1

Si:1s2 2s2 2p6 3s2 3p2

He:1s2

Na: 1s2 2s2 2p6 3s1

P:1s2 2s2 2p6 3s3 3p3

None belong to third period

Hope it helps..

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