A B C D and E have following electronic configurations A - 1s2 2s2 2p1 B - 1s2 2s2 2P6 3s2 3P1 C - 1S2 2S2 2P6 3S2 3P3 D - 1s2 2s2 2p6 3s2 3P5 E - 1S2 2S2 2P6 3S2 3P6 4S2 (a)Which elements belong to the same group? (b) Which elements belong to the same period? (c) Which element is a metal?
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B,C,D,E belongs to the same period and A,B belongs to the same group.B and E are metals.
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