Ionic Radii

Anions have ionic radii that are larger than their atomic radii.

• True

• False

Answer explanation

Anions have gained electrons, leading to increased electron-electron repulsion and larger ionic radii compared to their atomic radii.

This circles in this diagram could represent

• Sulfur

• Potassium

• Phosphorous

• Bromine

Answer explanation

The circles in this diagram could represent Potassium, as it is the correct answer choice provided. The other options are not relevant to the context of the question.

Tags

NGSS.HS-PS1-1

Which species has the larger radius?

• Cl

• ^Cl-

Answer explanation

The species with the larger radius is Cl-, as it has an extra electron compared to Cl, leading to a larger atomic radius due to increased electron-electron repulsion.

The different size between Cl and Cl- is because

• They have different effective nuclear charge

• They have different number of shells

• Cl- has stronger electron repulsion

• Cl has stronger electron repulsion

Answer explanation

Cl- has stronger electron repulsion

Tags

NGSS.HS-PS1-1

Nucleus attraction towards valence electron in Cl is ________ compared to in Cl^-. So that the size of Cl is ______ compared to Cl^-.

• stronger, smaller

• weaker, bigger

• stronger, bigger

• weaker, smaller

Answer explanation

Nucleus attraction towards valence electron in Cl is stronger compared to in Cl-. This results in the size of Cl being smaller compared to Cl-.

Tags

NGSS.HS-PS1-3

An element X has proton number of 13. Which statements is correct?

• X³⁺ is smaller than X

• X and X³⁺ has the same number of shells

• X and X³⁺ has the same number of inner electrons

• X and X³⁺ has the same value of effective nuclear charge

Answer explanation

X^3+ is smaller than X because it has lost electrons, resulting in a higher effective nuclear charge pulling the remaining electrons closer.

Tags

NGSS.HS-PS1-1

The Br^- anion is larger than the Br atom because - 

• Br^- has more electrons than Br, and more electrons repel each other

• Br has more electrons than Br^-, and more electrons repel each other

• Br^- has more protons, so it has more attraction for its electrons

• Br has more protons, so it has more attraction for its electrons

An ion of which element has a larger radius than an

atom of the same element?

• aluminum

• chlorine

• magnesium

• sodium

Which of the following ions has the largest ionic radius?

• Na+

• Mg2+

• Al3+

• Cl-

The ionic radius of an anion is generally larger than its atomic radius because:

• The anion has more protons than electrons

• The anion has more electrons than protons

• The anion has more electron-electron repulsion

• The anion has fewer electron-electron repulsion