Question

If each orbital can hold a maximum of 3-electrons. the no. of elements in the 4th period of the periodic table is-------

48

57

27

36

Answer 1

Answer:

The correct answer is 27.

Explanation:

An electron configuration for the elements of the fourth period is written as follow:

For the 4s orbital:

l=0,⇒2l+1=1

For the 3d orbitals:

l=2,⇒2l+1=5

For the  4p orbitals  

l =1⇒2l+1=3

Thus, the hypothetical electron configuration we would then write is...

4s1⋅3, 3d5⋅3, 4p3⋅3

= 4s3d154p9

And that expands the fourth period of the periodic table from  18 elements to 27 elements.

Answer 2

Answer:

: The correct answer is 27.

Thus, the hypothetical electron configuration we would then write is... And that expands the fourth period of the periodic table from 18 elements to 27 elements.