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13 Cards in this Set
- Front
- Back
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(def.) Elements Cannot be.....
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Elements cannot be subdivided by chemical or physical means.
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THE BIG FOUR
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Carbon
Hydrogen Nitrogen Oxygen |
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THE NEXT SEVEN
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Calcium, Phosphorus, Potassium, Sulfur, Chlorine, Sodium, Magnesium
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THE TRACE ELEMENTS
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Cr, Co, Cu, F, I, Fe, Mn,
Molybdenum, Zn |
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example of a triatomic element
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Ozone
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PROTON
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A subatomic particle with a charge of +` and a mass of appx.
1 amu, it is found in a nucleus. |
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ATOMIC MASS
UNIT |
An amu= 1.6605x10^-24 g
1amu= 1/12 the mass of a carbon atom containing 6 protons and 6 neutrons. |
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ELECTRON
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A subatomic particle with a charge of -1 and a mass of appx. .0005 amu; it is found in the space surrounding a nucleus.
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NEUTRON
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A subatomic particle with a mass of appx. 1 amu and a zero charge; it is found in the nucleus.
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MASS NUMBER
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The sum of the number of protons plus the number of neutrons in the nucleus of the atom. (listed top left of element abbrev. on table)
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ISOTOPES
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Atoms with the same number of protons, but different number of neutrons. example, carbon-12, and carbon-13
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ATOMIC NUMBER
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the atomic number of an element is the number of protons in its nucleus. On the table, it is the # to the bottom left of element.
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ATOMIC WEIGHT
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The atomic weight is the average of masses in amu of naturally occurring isotopes.
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