Chem unit 4

are atoms that have gained a positive or negative charge.

the difference in reactivity is directly related to the valence electrons. Unreactive noble gases have electron configurations that have a full outermost energy level.

A positively charged ion.

a negatively charged ion.

• ions made up of more than one atom.
• a polyatomic ion composed of an element bonded to one or more oxygen atoms is an oxyanion.
• The ion with the greater number of oxygen atoms gets the suffix -ate
• The ion with the fewer oxygen atoms gets the suffix -ite.