Periodic Trends...use your notebook to take notes, ask questions

Front

What is the atomic radius?

Back

A measure of the size of an atom.

Front

Which atom has the largest atomic radius?

Back

Francium.

Front

What trend occurs in atomic radius as you move across a period in the periodic table?

Back

Atoms tend to get smaller.

Front

What causes the decrease in atomic radius across a period?

Back

The increase in the number of protons in the nucleus.

Front

What is ionization energy?

Back

The amount of energy required to remove an electron from an atom.

Front

Which element has a higher ionization energy than arsenic (As)?

Back

Neon (Ne).

Front

What trend occurs in ionization energy as you move down a group in the periodic table?

Back

Ionization energy generally decreases.

Front

What is the reason for the decrease in ionization energy down a group?

Back

Increased distance of the outer electrons from the nucleus and increased electron shielding.

Front

What is the relationship between atomic radius and ionization energy?

Back

Generally, as atomic radius increases, ionization energy decreases.

Front

What is the periodic trend for electronegativity as you move across a period?

Back

Electronegativity increases.