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Atoms
Question | Answer |
---|---|
Dalton | Atoms smooth and unbreakable, first atomic model, same elements are the same |
Thomson | Atoms have electrons which are negatively charged particles, positive charges balance out the negative (atoms have no charge) |
Rutherford | Atoms are mostly empty space, positive charge in center which is the nucleus, nucleus has one or more positively charged particles, protons are positive charge, electrons on outside |
Bohr | Electrons found in specific orbits around nucleus, each electron has fixed energy (can't change) |
Schrödinger | Electrons move in cloud like region around nucleus, electron movement related to energy level, different energy level guarantees different places |
Chadwick | Neutron in nucleus have no charge, nucleus has protons and neutrons, atom has cloud like region of moving electrons |
Ball model | Dalton |
Watermelon/plum pudding model | Thomson |
Cherry model | Rutherford |
Tree rings | Bohr |
Cloud model | Schrödinger |
1808 | Dalton |
1897 | Thomson |
1909-1911 | Rutherford |
1913 | Bohr |
1926 | Schrödinger |
1932 | Chadwick |