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15 Cards in this Set
- Front
- Back
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Dalton |
*all matter is made of small particles can't be divided * given elements are identical * combine in whole # ratios to form componds * combined / rearranged in reactions |
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Thomson |
Discovered the electron (plum pudding model) |
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Millikan |
Charge of the the electron(negative) |
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Democritus |
"Atomos" indivisible (can not be divided) |
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Rutherford |
*gold foil experiment * mostly empty space * positive charged particles * positive nucleus |
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3 subatomic particals of an atom |
Protons, neutrons, electrons |
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How is mass number determined? |
Protons + Neutrons = Mass Number |
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What is released when an electron moves back to ground state? |
Photon |
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Isotopes have the same number of _______ And different _________. |
* protons *neutrons |
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Symbol for the element with 51 protons and 54 electrons |
Sb^-3 |
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Definistion of ION |
Is an atom w/ positive / negative charge |
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Units for average atomic mass and mass number? |
Amu |
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Electromagnetic radiation from lowest to highest energy |
*radiowaves *microwaves *inferred *visible *uv (ultraviolet) *xrays *gamma |
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What type of radiation has the lowest frequency? |
Radiowaves have the lowest frequency |
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Which type of radiation has the lowest wavelength? |
Gama has the lowest wave length |
