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Atomic STructure
| Term | Definition |
|---|---|
| proton | positive subatomic particle; mass 1= amu; location nucleus |
| neutron | neutral subatomic particle; mass = 1 amu; location nucleus |
| electron | negative subatomic particle; mass = 0 amu; location in the cloud |
| Atomic Number | identifies element; number of protons in nucleus |
| Mass Number | mass of nucleus of an isotope; always a whole number; protons + neutrons |
| Atomic Mass | weighted average of naturally occurring isotopes; decimal value on periodic table |
| isotopes | atoms of the same element with different numbers of neutrons |
| ions | charged atoms - too many or too few electrons |
| anion | a negative ion; extra electrons |
| cation | a positive ion; too few electrons |
| ground state | electrons in lowest energy state possible; on periodic table |
| excited state | electron that has absorbed energy and jumped to higher level |
| bright line spectrum | colored lines produced when excited state electrons emit energy as light to fall back to ground stated |
| gold foil experiment | proof that atoms are mostly empty space with a dense positive nucleus |
| electron configuration | how/ where electrons are likely to be found around a nucleus |
| wave mechanical model | electrons are in a cloud around nucleus with different amounts of energy |
| Bohr model | electrons orbit nucleus in specific paths |
| orbital | region of space where an electron might be found |
Created by:
mrsflower
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