- Find image for trends of ionic charges.
Early Atomic Experiments
- Plum Pudding Model
- A large cloud of positive charge with small chocolate chips of negative charges.
- Used cathode ray tube to tell us that atoms have negative charges.
- Rutherford's Gold Foil
Accepted Atomic Model
- Most particles moved through gold foil.
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- Some reflected, fewer bounced back.
- Told us that atoms are largely empty space with small, dense center of positive charge.
Subatomic Model
- Most mass in center of atom, consisting of protons and neutrons.
- Has a larger electron cloud with negative electrons, mostly empty space.
- Nucleus
- Dense center consisting of protons and neutrons.
- Protons
- Exists in the nucleus.
- Mass = 1.673E-27kg