ATOMS – KEEP IT FOREVER PLACE

Particles Atoms Elements

Molecules

•An atom has small particles that make up the atom.• An element is made of atoms.• A substance is made out of elements.

For any element: Number of Protons = Atomic Number Number of Electrons = Number of Protons = Atomic Number Number of Neutrons = Mass Number - Atomic Number

Example Krypton: Number of Protons = Atomic Number = 36 Number of Electrons = Number of Protons = Atomic Number =

36 Number of Neutrons = Mass Number - Atomic Number = 84 -

36 = 48

HOW MANY PROTONS, NEUTRONS, AND ELECTRONS?

Mass Number = (Number of Protons) + (Number of Neutrons)

Number of Protons = Number of Electrons