Atomic Radius and Ion Radius Quiz

Identify the correct direction of atomic radius decrease in a period: A, B, C, or D?

• A

• B

• C

• D

Identify the correct direction of atomic radius increase in a group: A, B, C, or D?

• A

• B

• C

• D

As you go across a period (L to R), what happens to the number of protons, electrons, and energy levels in an atom? How does this help explain the trend in atomic radius?

• The number of protons increases, the number of electrons increases, and the number of energy levels remains the same.

• The number of protons increases, the number of electrons remains the same, and the number of energy levels increases.

• The number of protons remains the same, the number of electrons increases, and the number of energy levels increases.

• The number of protons decreases, the number of electrons decreases, and the number of energy levels remains the same.

identify the atom with the largest atomic radius: Sodium, Magnesium, or Aluminum?

• Sodium

• Magnesium

• Aluminum

Identify the atom with the largest atomic radius: Iodine, Chlorine, or Bromine?

• Iodine

• Chlorine

• Bromine

Identify the arrow that shows the trend of increasing atomic radius in a period: A, B, C, or D?

• A

• B

• C

• D

The removal of an electron from an atom causes the remaining electrons to be pulled on with _______ electrical force from the nucleus.

• less

• more

Which of the following ions would have the smallest radius?

• Na⁺¹

• Mg⁺²

• K⁺¹

• Ca⁺²

What is the effect of losing an electron on the electrical force experienced by the remaining electrons?

• Increases

• Decreases

• No change

When an atom becomes a cation, its size:

• Increases

• Decreases

• Remains the same