Atomic Structure
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Created by:
babyblythe on September 27, 2010
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22 terms
Terms | Definitions |
|---|---|
 domocratis | came up w/ atom 4 b.c. |
| dalton's theory..1 | elements are made of atoms |
| dalton's theory.. 2 | atoms of same elements are identical & different from other elements |
| dalton's theory.. 3 | atom's can mix or combine chemically to form a compound |
| dalton's theory.. 4 | combine chemically in whole # ratios |
| dalton's theory.. 5 | atom's can combine chemically but not changed into atoms of other elements |
| Millikan discovered.. | electrons' charge(negative)and mass(1/1840) |
| Thomson discovered.. | electrons |
| Goldstein discovered.. | proton positive charge, mass=1 |
| Chadwick discovered.. | neutron no charge, mass=1 |
| Atomic # = | # of protons |
| Mass # = | total # of protons & neutrons |
| No decimal on periodic table | unstable element (radioactive) |
| Transuranium | Doesn't exist in nature |
| Rutherford discovered.. | nucleus |
| Rutherford's model.. | Gold foil experiment |
| Isotopes | atoms that have the same # of protons but different # of neutrons |
| Alpha particles stopped by.. | sheet of paper |
| Beta particles stopped by.. | metal foil |
| Gamma particles stopped by.. | nothing |
| fission | splitting large nuclei in half |
| fusion | putting small nuclei together |
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