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Unit 2 The Atom
Unit 2 Chemistry- The Atom
Question | Answer |
---|---|
proton | subatomic particle with a positive charge |
neutron | subatomic particle with no charge |
electron | subatomic particle with a negative charge |
nucleus | the central most dense part of an atom |
mass number | the sum of the number of protons and neutrons of an element |
atomic number | the number representing the number of protons/electrons of an element |
J.J. Thompson | created the plum-pudding or chocolate chip cookie model of the atom |
Earnest Rutherford | performed the gold foil experiment and discovered the nucleus. |
Democritus | Greek philosopher used the term atomos to describe the atom as indivisible |
Aristotle | Greek philosopher who said that all matter is made of only 4 elements (earth-wind-fire-water |