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5 Cards in this Set
- Front
- Back
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Element |
is a substance that cannot be broken down to other substances by chemical reactions. Example: gold, copper, carbon, oxygen |
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Compound |
is a substance consisting of two or more different elements combined in a fixed ratio. |
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What elements make up 96% of living matter? |
Oxygen 65% Carbon 18.5% Hydrogen 9.5% Nitrogen 3.3% |
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Trace element |
An element indispensable for life but required in extremely minute amounts. |
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Neutron |
A subatomic particle having no electrical charge ( electrically neutral), with a mass of about 1.7x10 ^-24g, found in the nucleus of an atom. |
