Periodic Table and Periodic Trends

Front

What is the periodic table?

Back

A tabular arrangement of chemical elements, organized by increasing atomic number, electron configuration, and recurring chemical properties.

Front

What is ionization energy?

Back

The energy required to remove an electron from an atom in its gaseous state.

Front

What trend is observed in ionization energy across a period?

Back

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

Front

What trend is observed in ionization energy down a group?

Back

Ionization energy generally decreases down a group due to increased distance of the valence electrons from the nucleus.

Front

What is atomic radius?

Back

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

Front

What trend is observed in atomic radius across a period?

Back

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

Front

What trend is observed in atomic radius down a group?

Back

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

Front

What is electronegativity?

Back

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

Front

What trend is observed in electronegativity across a period?

Back

Electronegativity generally increases across a period from left to right.

Front

What trend is observed in electronegativity down a group?

Back

Electronegativity generally decreases down a group.