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16 Cards in this Set
- Front
- Back
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atom |
basic building block of matter |
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atomic number |
the number of protons in an atom |
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chemical bond |
a force of attraction between atoms and ions |
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chemical formula |
a formula that shows how many atoms of each kind of element are present in one molecule of a compound |
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chemical symbol |
one or two letter abbreviation for the element |
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compound |
a pure substance made up of two or more elements that are chemically combined |
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electron |
negatively charged particle in an atom |
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element |
a substance that cannot be broken down into other substances |
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ion |
an atom that has more or fewer electrons than it has protons |
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isotopes |
atoms with thee same number of protons but different numbers of nuetrons |
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molecule |
a group of two or more atoms held together by covalent bonds |
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neutron |
uncharged particle in the nucleus of an atom |
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nucleus |
central part of an atom |
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periodic table |
a table that arranges the elements according to their atomic masses |
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proton |
positively charged particle in the nucleus of an atom |
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pure substance |
a substance that cannot be broken down into other substances |
