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20 Cards in this Set
- Front
- Back
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Element |
A pure substance that consists only of atoms with the same number of protons |
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Atomic number |
Number of protons |
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Mass number |
Number of protons and number of neutrons |
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Isotope |
Different forms of an element with the same number of protons but different number of neutrons |
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Trace elements |
Found in small amounts, but are important for functioning |
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Ionic bond |
Electrons are transferred and a bond is crested by the electrical attraction of oppositely charged ions They steal |
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Ion |
Atoms with a + or - charge |
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Covalent bond |
Bond in which two atoms share one or more pairs of outer shell electrons They share |
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Polar |
- charge on one side + on other H2o |
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Hydrogen bond |
Attraction between + and - sides of water molecules (between) |
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Heat capacity |
Ability to absorb it release heat/energy without changing temp. |
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Neutron |
Uncharged subatomic particle in the atomic nucleus. |
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Proton |
Positively charged subatomic particle that occurs in the nucleus of all atoms |
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Radioactive decay |
Process by which atoms of a radioisotope emit energy and/or subatomic particles when their nucleus spontaneously breaks up |
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Radioisotope |
Isotope with an unstable nucleus |
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Chemical bond |
Attractive force that arises between two atoms when their electrons interact |
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Compound |
Molecule that has atoms of more than one element. |
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Electronegativity |
Measure of the ability of an atom to pull electrons away from other atoms |
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Polarity |
Separation of charge into positive and negative regions |
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Cohesion |
Property of a substance that arises from the tendency of its molecules to resist separating from one another |
