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10 Cards in this Set
- Front
- Back
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anything that occupies space and has mass
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matter
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a pure substance that cannot be broken down into other substances by chemical means
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element
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elements that make up less than 0.1 percent of your body mass, are nevertheless critical to your health
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trace elements
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a substance containing two or more elements that are chemically combined in a fixed ratio
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compound
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the smallest possible particle of an element
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atom
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a subatomic particle with a single unit of positive electrical charge
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electron
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a third type of subatomic particle, it has no charge
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neutron
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an atom's protons and neutrons, tightly packed together forming a central core is a..
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nucleus
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all atoms of a particular element have the same number of protons known as the elements..
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atomic number
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some elements that have alternate forms. ______ of an element have the same number of protons in their atoms but different numbers of neutrons
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isotopes
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