Nuclear Physics

The Atom.

• Plum Pudding Model- Possitive 'dough' negative 'plums'.
• Nuclear Model- atom with a nucleus.

Rutherford & Marsden.

• Created a scattering experiment.
• Alpha Particals were blasted into a piece of gold foil.
• Most alpha particals passed straight through.
• Some were passed through but were deflected at different angles.
• Very few particals were deflected back on themselves (very large angle.)
• Therefore, an atom consists mostly of open space, with a possitivly charged nucleus ( the alpha paricals are possitive- so they are repelled by the possitive nucleus.).

Proton- Charge +1. Mass 1.

Neutron- Charge 0. Mass 1.

Electron- Charge -1. Mass 0.

In a neutral atom.- the number of protons equals the number of electrons- therefore there is no overall charge.

• Atoms can gain/ loose electrons to be charged ions.
• Atoms of the same element but of differentnumbers of…