Periodic Trends

• Increases down groups
• Decreases from left to right

The minimum amount of energy required to remove one electron from each atom in a mole of atoms in the gaseous state.

• Decreases down a group
• Increases from left to right

The energy gained by an atom when an electron is added to it.

• Decreases down a group
• Increases left to right

A measure of the ability of an atom or molecule to attract pairs of electrons in the context of a chemical bond.

• Decreases down a group
• Increases left to right