Question

Consider Group 5A elements: nitrogen, phosphorus, and arsenic. These elements show an increase in their atomic numbers. Which element has the highest ionization energy?

Answer 1

its nitrogen as its outer electron is closer to the nucleus so there will be a stronger electrostatic attraction between it and its nucleus

hope that helps

Answer 2

Answer: Nitrogen has the highest ionization energy.

Step-by-step explanation:

Ionization energy is defined as the amount of energy required to remove an electron from an isolated gaseous atom.

`X(g)\rightarrow X^+(g)+e^-`

In a periodic table, ionization energy increases as we go from left to right in a period and decreases when we go down in a group.

Group 5A elements are Nitrogen, phosphorous, arsenic, Antimony and Bismuth.

So, the order of ionization energy in the group will be:

`N>P>As>Sb>Bi`

Hence, the nitrogen has the highest ionization energy.