Question

Which element has the greatest number of valence electrons available for bonding? selenium boron calcium chlorine

Answer 1

Answer: The answer is D. Chlorine

Explanation:

Answer 2

Answer : The correct option is, Chlorine

Explanation :

The given elements are, Se, B, Ca, Cl

• Element is Selenium, Se

Atomic number = 34

Group number = 16

General Electronic configuration of the group number 16 elements is, $ns^2np^4$.

The general configuration shows the number of valence electrons are present in the element.

The number of valence electrons present = 2 + 4 = 6

• Element is Boron, B

Atomic number = 5

Group number = 13

General Electronic configuration of the group number 13 elements is, $ns^2np^1$.

The number of valence electrons present = 2 + 1 = 3

• Element is Calcium, Ca

Atomic number = 20

Group number = 2

General Electronic configuration of the group number 2 elements is, $ns^2$.

The number of valence electrons present = 2

• Element is Chlorine, Cl

Atomic number = 17

Group number = 17

General Electronic configuration of the group number 17 elements is, $ns^2np^5$.

The number of valence electrons present = 2 + 5 = 7

From this we conclude that the chlorine is the element which has the greatest number of valence electrons available for bonding.

Hence, the correct option is, Chlorine.