Atomic Radius

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

Which periodic group has the smallest atomic radius?

Back

Noble Gases.

Front

Which element has a larger atomic radius than Zinc?

Back

Strontium.

Front

What happens to atomic radius as you move across a period in the periodic table?

Back

Atomic radius decreases.

Front

Why do atoms get smaller as you move across a period?

Back

Because the atoms have more protons, which increases the positive charge and pulls electrons closer to the nucleus.

Front

Which element has the largest atomic radius in Group 18?

Back

Radon (Rn).

Front

Order the following elements in increasing atomic radii: Ra, Be, Ca, Rb, H.

Back

H, Be, Ca, Rb, Ra.

Front

What is the trend of atomic radius down a group in the periodic table?

Back

Atomic radius increases down a group.

Front

Why does atomic radius increase down a group?

Back

Because additional electron shells are added, increasing the distance between the nucleus and the outermost electrons.

Front

What is the atomic radius of Helium (He)?

Back

Helium has a very small atomic radius, approximately 31 picometers.