Periodic Table Trends

Front

What is electronegativity (EN)?

Back

Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons.

Front

Which element has a higher electronegativity: H or F?

Back

F has a greater electronegativity than H.

Front

What is electron affinity?

Back

Electron affinity is the amount of energy released when an electron is added to a neutral atom to form a negative ion.

Front

What is the formula for electron affinity?

Back

A + e⁻ → A⁻ + energy (in kJ/mol)

Front

Which element has chemical properties most similar to calcium (Ca)?

Back

Beryllium (Be) has chemical properties most similar to calcium.

Front

What is the trend in atomic radius as you move from left to right across a period in the periodic table?

Back

The atomic radius decreases from left to right across a period.

Front

What causes the decrease in atomic radius across a period?

Back

The decrease is caused by an increase in the nuclear charge, which pulls electrons closer to the nucleus.

Front

What happens to the atomic radius as you move down a group in the periodic table?

Back

The atomic radius increases as you move down a group.

Front

What causes the increase in atomic radius down a group?

Back

The increase is due to the addition of electron shells.

Front

What is the relationship between electron configuration and chemical properties?

Back

Elements with similar electron configurations tend to have similar chemical properties.