Q. 37

Identify and name the metals out of the following elements whose electronic configurations are given below.

(a) 2, 8, 2

(b) 2, 8, 1

(c) 2, 8, 7

(d) 2, 1

Answer :

Elements with 1 to 3 valence electrons are usually metals. Elements with 4 or more valence electrons are usually non-metals or metalloids.

(a) 2, 8, 2 – Magnesium (12)

(b) 2, 8, 1 – Sodium (11)

(d) 2, 1 – Lithium (3)

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Identify and name the metals out of the following elements whose electronic configurations are given below.(a) 2, 8, 2(b) 2, 8, 1(c) 2, 8, 7(d) 2, 1