Periodic Trends Practice

Front

What is ionization energy?

Back

Ionization energy is the amount of energy required to remove an electron from an atom.

Front

Which element has the lowest ionization energy in Group 1?

Back

Francium (Fr) has the lowest ionization energy in Group 1 because its 1 valence electron is very far from the nucleus, so little energy is needed to remove it.

Front

What is the trend of ionization energy across a period?

Back

Ionization energy generally increases across a period from left to right due to increasing nuclear charge.

Front

What is the trend of ionization energy down a group?

Back

Ionization energy generally decreases down a group because the outer electrons are farther from the nucleus and experience more shielding.

Front

What is electronegativity?

Back

Electronegativity is a measure of the ability of an atom to attract electrons in a chemical bond.

Front

Which element has a higher electronegativity than arsenic (As)?

Back

Carbon (C) has a higher electronegativity than arsenic (As).

Front

What is atomic radius?

Back

Atomic radius is the distance from the nucleus to the outermost electron cloud of an atom.

Front

What is the trend of atomic radius across a period?

Back

Atomic radius generally decreases across a period from left to right due to increasing nuclear charge pulling electrons closer.

Front

What is the trend of atomic radius down a group?

Back

Atomic radius generally increases down a group because additional electron shells are added.

Front

Which element has the largest atomic radius in Group 18?

Back

Radon (Rn) has the largest atomic radius in Group 18.