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15 Cards in this Set

  • Front
  • Back
John Daltons theory was; All _______ is made up of tiny _______ called ________.
matter, particles, atoms
Atoms have a _____ in the center made up of three differnet ________ particles.
nuclues, subatomic
A submatomic particle with a postive charge found in the Nuclues.
A proton
A submatomic particle with no charge found in the nuclues.
a submatomic particle with a negative charge: Surronds the nuclues
electrons circle the nuclues in a fixed orbit. Low energy electrons were thought to orbit close to the nucleus, and high energy electrons orbited further away from the nucleus.
The Bohr Model
electrons may occupy many positions around the nucleus in a spherical orbit.
The Modern model
Most of the mass of an atom is found in the
Protons and neutrons have
about the same mass
Protons have ____ more mass than electrons.
2,000 tomes
Protons and electrons have different masses but they
have strong charges
The atThe attraction betweenpostive protons and negative electrons is
what holds the atoms together
Positive charges have
more protons
Negative Charge
more electrons
Nuetral charge
Equal number of protons and electrons