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1s2 2s2 2p6 3s2 3p1

3s23p1

2nd answer :

outer electron configuration is the same as valence electron , you can easily find it in the period table : using the number of the group :

Group 1 : one, Group 2 :two , Group 3-12 cannot be found instead d electron count is used , group 13 : three , Group 14 : four ans so on until Gruop 18 : Eight

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14y ago

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