Periodic Trends

Front

What is the periodic trend for atomic radius as you move down a group in the periodic table?

Back

Atomic radius increases as you move down a group due to the addition of electron shells.

Front

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

Back

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

Front

Which group in the periodic table contains elements with the smallest atomic radius?

Back

Noble Gases.

Front

What happens to the size of an atom when it loses an electron?

Back

It becomes a cation and decreases in size.

Front

What is a cation?

Back

A cation is a positively charged ion formed when an atom loses one or more electrons.

Front

What is the definition of electron affinity?

Back

Electron affinity is the amount of energy released when an atom accepts an electron.

Front

How does electron affinity generally change across a period?

Back

Electron affinity generally increases as you move from left to right across a period.

Front

What is the relationship between ionization energy and atomic radius?

Back

Ionization energy generally increases as atomic radius decreases because the electrons are held more tightly by the nucleus.

Front

What is the trend for ionization energy as you move down a group?

Back

Ionization energy decreases as you move down a group due to increased distance between the nucleus and the outermost electrons.

Front

What is the definition of atomic radius?

Back

Atomic radius is the relative size of an atom's electron cloud.