Terms
A region around the nucleus of an atom
Electron Cloud
Said that electrons are found in specific energy levels
Bohr
This force pulls objects toward each other
Gravitational pull
Scientist shot positively charged particles at a gold foil
Atomic Number 2
Helium
Atomic Mass Unit (AMU)
Said that atoms have negative particles called electrons
Thomson
a force that says opposite attract and same repel
Shows that electrons are scattered throughout the atom
Plum pudding Model
Atomic Number 1
Hydrogen
The particles in the nucleus that has no charge
Neutron
Said that the positive part of the atom, the nucleus, is small and dense
Rutherford
A force that binds together particles to make larger particles
Rutherford's Gold Foil
Atomic Number 11
Sodium
An atom that looses one of its charges
Says that each element is made a different type of atom
Dalton
This force is important in unstable atoms
Weak force
This experiment used invisible beams called cathode rays
Cathode-Ray Tube
Atomic Number 6
Carbon
Have the same number of protons, but different number of neutrons
Isotope
Says that you cannot predict exactly where an electron is or what path it will take
A force that holds atoms together
Strong Force
This model shows that electrons move around the nucleus like planets around the sun
Bohr Model
Daily Double!
Tin