Ionic Radii

Why are positive ions smaller than their parent atoms?

• Positive ions gain electrons, increasing their size.

• Positive ions lose electrons, leading to a stronger attraction between the nucleus and the remaining electrons.

• Positive ions have the same number of electrons as their parent atoms.

• Positive ions have more protons than their parent atoms.

Tags

NGSS.HS-PS1-1

What causes the ionic radii to increase down Group 1?

• Increase in occupied energy levels

• Decrease in electron-proton attraction

• Increase in nuclear charge

• Decrease in occupied energy levels

Why does the ionic radius decrease across Period 3 from sodium to silicon?

• Decrease in electron shielding

• Increase in nuclear charge without an increase in shielding

• Increase in electron shielding

• Decrease in nuclear charge

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What trend is observed in the ionic radii of negative ions across Period 3?

• It increases from left to right.

• It remains constant.

• It decreases from left to right.

• No specific trend is observed.

What is the significance of ions being isoelectronic in Period 3?

• They have different electron configurations.

• They have the same number of protons.

• They have identical ionic radii.

• They have the same electron configuration.

Tags

NGSS.HS-PS1-1

What causes the ionic radius to decrease from the sodium ion to the aluminium ion in Period 3?

• Decrease in nuclear charge

• Increase in nuclear charge without an increase in shielding

• Increase in electron-proton attraction

• Decrease in electron shielding

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Why are the first four positive ions in Period 3 isoelectronic?

• They have the same number of neutrons.

• They are all gases at room temperature.

• They share the same electron configuration.

• They have the same number of protons.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How does the ionic radius of negative ions compare to their parent atoms?

• It is larger due to a decrease in nuclear charge.

• It is smaller due to loss of electrons.

• It remains unchanged.

• It is larger due to the addition of electrons.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Why do negative ions have a larger ionic radius than their parent atoms?

• Due to the increase in nuclear charge.

• Due to the loss of electrons.

• Because they have more electrons, leading to weaker nuclear attraction.

• Because they have fewer protons than electrons.

Tags

NGSS.HS-PS1-1

What is the effect of gaining electrons on the size of an ion?

• It has no effect on the size of the ion.

• It causes the ion to decrease in size.

• It reduces the nuclear charge.

• It causes the ion to increase in size.