Question 1

Which of the following elements has the smallest ionization energy?

Accepted Answer

K

Question 2

Ionization energy is defined as:

Accepted Answer

The energy required to remove an electron from a gaseous atom or ion.

Question 3

Which element from Group 7A has the lowest ionization energy?

Accepted Answer

I

Question 4

Which of the following elements would lose an electron the easiest?

Accepted Answer

Zn

Question 5

Which of the following has the highest ionization energy?

Accepted Answer

Kr

Question 6

What is the general trend for ionization energy across a period from left to right?

Accepted Answer

Ionization energy increases.

Question 7

Which of the following elements is most likely to form a cation in a chemical reaction?

Accepted Answer

K

Question 8

Noble gases possess high ionization energies due to:

Accepted Answer

Their stable electron configurations.

Question 9

Which of the following equations correctly represents the first ionization energy of sodium?

Accepted Answer

$$\mathrm{Na} (g) \rightarrow \mathrm{Na}^+ (g) + e^-$$

Question 10

Rank the following elements in order of increasing ionization energy: Br, F, Ga, K, Se.

Accepted Answer

K \u003c Ga \u003c Br \u003c Se \u003c F

Question 11

Which of the following statements about ionization energy is correct?

Accepted Answer

Ionization energy increases as you move from left to right across a period.

Question 12

A patient is exposed to a gas containing potassium atoms. Which property of potassium makes it dangerous in terms of ionization energy?

Accepted Answer

Potassium has a low ionization energy, making it highly reactive.

Question 13

Which element would require the most energy to remove an electron from its outer shell?

Accepted Answer

F

Question 14

Why do elements in Group 1A have lower ionization energies compared to elements in Group 7A?

Accepted Answer

Group 1A elements have electrons farther from the nucleus and less nuclear charge.

Question 15

Which of the following elements is least likely to lose an electron?

Accepted Answer

Ne

Question 16

If an atom has a high ionization energy, what does this indicate about its chemical behavior?

Accepted Answer

It is less likely to participate in reactions that involve electron loss.

Question 17

Which of the following elements would have the greatest tendency to gain an electron?

Accepted Answer

F

Question 18

Which of the following best explains why noble gases have the highest ionization energies?

Accepted Answer

They have completely filled valence shells.

Question 19

A sample contains both sodium and chlorine atoms. Which atom will require more energy to remove an electron, and why?

Accepted Answer

Chlorine, because it has a higher nuclear charge and smaller atomic radius.

Question 20

Which of the following elements would have the lowest first ionization energy?

Accepted Answer

K

Ionization Energy and Periodic Trends: Study Notes for GOB Chemistry

Study Guide - Practice Questions