Question

Select the element in each pair with the higher ionization energy.
a. O or Ne
b. K or Br
c. Ca or Ba
d. Ne or N

Short answer

Part(a) Ne have the higher ionization energy.

Part(b) Br have the higher ionization energy.

Part(c) Ca have the higher ionization energy.

Part(d) Ne have the higher ionization energy.

Step-by-step solution

Part(a) Step 1 : Given information

We are given O or Ne elements. We have to find element with higher ionization energy.

Part(a) Step 2 : Simplify  

When we know from the periodic table, from left to right in the ionization, no energy diminishes or increases as the nuclear charge increases.
The ionization energy increases as the electrons get closer to the nuclear charge in the nucleus from bottom to top.
As a result, Ne has a greater ionization energy than O.

Part(b) Step 1 : Given information

We are given K or Br elements. We have to find element with higher ionization energy.

Part(b) Step 2 : Simplify  

When we know from the periodic table, from left to right in the ionization, no energy diminishes or increases as the nuclear charge increases.
The ionization energy increases as the electrons get closer to the nuclear charge in the nucleus from bottom to top.
As a result, Br have higher ionization energy than K.

Part(c) Step 1 : Given information

We are given Ca or Ba elements. We have to find element with higher ionization energy.

Part(c) Step 2 : Simplify  

When we know from the periodic table, from left to right in the ionization, no energy diminishes or increases as the nuclear charge increases.
The ionization energy increases as the electrons get closer to the nuclear charge in the nucleus from bottom to top.
As a result, Ca have higher ionization energy than Ba.

Part(d) Step 1 : Given information

We are given Ne or N elements. We have to find element with higher ionization energy.

Part(d) Step 2 : Simplify  

When we know from the periodic table, from left to right in the ionization, no energy diminishes or increases as the nuclear charge increases.
The ionization energy increases as the electrons get closer to the nuclear charge in the nucleus from bottom to top.
As a result, Ne have higher ionization energy than N.