Ionic Radius

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

Tags

NGSS.HS-PS1-1

An ion of which element has a larger radius than an

atom of the same element?

• aluminum

• chlorine

• magnesium

• sodium

Tags

NGSS.HS-PS1-1

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

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

NGSS.HS-PS1-2

when atom gain an electron (negative) the size of atom

• will increase

• will decrease

• will not change

when atom loses an electron (Positive) the size of atom

• Will be greater

• Will not change

• Will be smaller

Which group 2A element has the largest ionic radius?

• magnesium

• calcium

• barium

• radium

Tags

NGSS.HS-PS1-1

The sodium atom loses an electron to form a sodium ion (Na⁺). Which statement is correct with respect to its atomic radius?

• The sodium ion has a larger radius than the atom.

• The sodium ion has a smaller radius than the atom.

• The sodium ion and the sodium atom radii are the same size.

• The sodium ion has twice the radius of the sodium atom.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following ions has the largest ionic radius?

• A) Cl^-

• B) Na^+

• C) Mg^2+

• D) Al^3+

When comparing the ionic radius of anions and cations, which statement is true?

• A) Anions are generally larger than their parent atoms.

• B) Cations are generally larger than their parent atoms.

• C) Anions and cations have the same size as their parent atoms.

• D) Cations are generally larger than anions.