Which period contains the most abundant element of the atmosphere in gaseous form (A) First period (B) Second period (D) Fourth period (C) Third period
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Dear your answer is period 2
Sathvik212:
bro
could you help me i have an another question for u
yes
element X belongs to group 15 an element Y belongs to group 17 the formula of the compound formed between them with explanation pls
a.XY2 b.X2Y3 c.XY3 d.XY4
a.XY2 b.X2Y3 c.XY3 d.XY4
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