Question

An element x belong to 3rd period & 2nd group in the periodic table. state the valency by x​

Answer 1

Answer:

The valency of x is 3.

As it is in period 3 valence shell is 3 that is n=3 and since it's present in group 2, it has 2 valence electrons in the third shell. Hence its valence shell configuration is 3s2.

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Answer 2

Answer:

Since the number of valence electrons and the valency of group 2 elements is 2, the valency of element X is 2. (c) Group 2 is on the left side of the periodic table which consists of metals. Therefore X is a metal. (d) The name of the element is Magnesium (Mg), since X belongs to group 2 and the 3rd period.

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