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atoms and elements

what is matter anything that has mass and takes up space
Atoms comes from the Greek word " a - tons meaning invisible
1897 Thomson discovered atoms negatively and positively charges (watermelon)
1911 Rutherford discovered positively charged atoms that cluster (Jimmy neutron)
1913 Bohr showed how electrons orbit the nucleus (dartboard)
1920's (Schrodinger model) It was discovered that electrons orbit creates a " cloud - like" region of separate energy level (space)
1932 Chadwick discovers the neutron, which adds mass
1963 Gellman proposed the quark theory
Rutherford Jimmy neutron
Thomason Watermelon
Bohr Dartboard
Schrodinger Space
Earth's crust made of 73% is hydrogen 25% is helium 2% everything else
Most common element Oxygen Sand= (oxygen + silicon) NOT IN PURE STATE
Created by: Christian02