Atomic and Ionic Radii

Front

What is atomic radius?

Back

The atomic radius is the distance from the nucleus of an atom to the outermost shell of electrons.

Front

How does atomic radius change across a period in the periodic table?

Back

Atomic radius decreases from left to right across a period due to increased nuclear charge attracting electrons more strongly.

Front

What is ionic radius?

Back

The ionic radius is the measure of an atom's ion in a crystal lattice, which can differ from its atomic radius.

Front

How does ionic radius change down a group in the periodic table?

Back

Ionic radius increases down a group due to the addition of electron shells.

Front

Which element has the largest atomic radius: potassium, zinc, bromine, or rubidium?

Back

Rubidium has the largest atomic radius among these elements.

Front

Which element has the smallest ionic radius: oxygen, selenium, sulfur, or tellurium?

Back

Oxygen has the smallest ionic radius among these elements.

Front

Who developed the first published periodic table?

Back

Dmitri Mendeleev developed the first published periodic table.

Front

What happens to atomic radius as you move from metals to nonmetals in a period?

Back

Atomic radius decreases as you move from metals to nonmetals in a period.

Front

What is the trend of ionic radius for cations compared to their neutral atoms?

Back

Cations have a smaller ionic radius than their neutral atoms due to the loss of electrons.

Front

What is the trend of ionic radius for anions compared to their neutral atoms?

Back

Anions have a larger ionic radius than their neutral atoms due to the gain of electrons.