Ionic Bonding notebook page

When is an atom unlikely to react?

An atom with a negative charge

Made by adding an electron

Anion

An atom with a positive charge

Made by removing an electron

Cation

Ion - an atom that has a positive or negative charge.

Chemical Bond - force that holds atoms or ions together

Ionic Bond - force that holds anions and cations together

An electron dot diagram is used to show valence electrons for a given atom.

When the highest occupied energy level of an atom is filled with electrons, the atom is stable and not likely to react.

Some elements achieve stable electron configurations through transfer of the electrons between atoms.

Multiple Choice

Which number of electrons is most likely to make an element stable?

• 1

• 3

• 7

• 8

Multiple Choice

How many valence electrons does Sodium (Na) have?

• 1

• 2

• 7

• 8