Science, asked by zubair09, 1 year ago

guys please help me with this question.

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Answered by lakshminarayan29
1
Hope it helps........

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zubair09: dont u think ki 'A' would have 3 shells...
zubair09: bty tysm
zubair09: btw*
lakshminarayan29: Since A is in the first period a is Helium which has only 1 shell
lakshminarayan29: By the way what is btw tysm
zubair09: ohh ty dear
zubair09: ??
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