Download There are 3 particles in an atom

There are 3 particles in an atom.
1) Proton
2) Neutron
3) Electron
Protons have a positive charge and are found in the nucleus (center) of an
atom. They are always equal to the atomic number on the periodic table (top
number in the box).
Neutrons have no charge. They are neutral. They are also found in the center
of an atom.
Electrons have a negative charge. They are found outside the nucleus in what
is called the electron cloud. If an atom is stable (for you, they will be stable), the
number of electrons equals the atomic number (top number in the periodic table).
To find neutrons --> Look at the periodic table. The bottom number in the box is
called the atomic mass (also called mass number). You will round the atomic
mass to the nearest whole number and then subtract the atomic number.
Protons + Neutrons = Atomic Mass
Protons = Atomic #
Electrons = Atomic #
Neutrons = Atomics Mass (rounded) - Atomic #