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8 Cards in this Set
- Front
- Back
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Isotopes |
Atoms of the same element, with the same atomic number, but different mass numbers. |
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Relative isotopic mass |
The mass of one atom of an isotope relative to the mass of one atom of carbon-12, for which the relative mass is defined as exactly 12. |
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Atomic number |
Number of protons in its nucleus. |
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Mass Number |
Number of protons and neutrons in the nucleus. |
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Mole |
The mass of a substance containing the same number of fundamental units as there are atoms in exactly 12g of Carbon-12. |
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Avogadro's constant |
The number of particles there are in a mole of a substance. |
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Orbital |
A region in space around the nucleus of an atom in which there is a 95% chance of finding an electron, or a pair of electrons with opposite spins. |
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Relative atomic mass |
The average mass, taking into account each isotope mass, of the atoms of that element relative to 1/12th the mass of a carbon-12 atom. |
