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14 Cards in this Set
- Front
- Back
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atom
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the smallest unit of an element that still has properties of that element.
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proton
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a subatomic particle that has a positive charge
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nucleus
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the center of an atom, usually made up of protons and nuetrons
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neutron
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a subatomc particle that has the same mass as a proton but no electric charge
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electron
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a subatomic particle that has a negative charge and orbits the nucleus at great speeds.
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atomic number
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the number of protons in an atom
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element
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a substance made up of only one kind of atom
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metal
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a substance that conducts heat and electricity and heat well and is malleable
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nonmetal
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a substance that does not conduct electricity well and is not malleable
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periodic table
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a table that shows the elements arranged by their atomic numbers
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compound
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a substance made up of atoms of two or more elements that are chemically combined
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melting point
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the temperature at which a substance changes from a solid to a liquid
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boiling point
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the temperature at which a substance changes from liquid to gas
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atomic mass
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the sum of the number of protons and neutrons in the nucleus of an atom
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