Question

a metal has an atomic number of ?​

Answer 1

Answer:

Elements having 1,2 or 3 electrons in its last shell act as metals.

32=[Ar]3 d

10

4s

2

p

2

34=[Ar]3 d

10

4s

2

p

4

36=[Ar]3 d

10

4s

2

p

6

38=[Ar]3 d

10

4s

2

p

6

,5s

2

In the above electronic configuration, the last electron enters into 5s orbital, hence it is an alkaline earth metal.

Thus option D is correct.