Question

Write the valency,  group and period of these elements in the periodic table.Identify the metal also.  

X  At. no -7, Y At. No.12 and Z at. no.18

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Answer 1

Answer:

X is Nitrogen, valency = -3, period = 2, Group = 15

Y is Magnesium, valency = +2, period = 3, Group = 2

Z is Argon, valency = 0, period = 3, Group = 18