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Definition
| Substance that cannot be broken down to other substances by chemical reaction. Today there are 92 elements that occur in nature. |
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Definition
| A substance consisting of two or more different elements combined in a fixed radio. |
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Term
| 4 elements that make up 96% of living matter |
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Definition
| Carbon, Oxygen, Nitrogen, and Hydrogen |
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Term
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Definition
| Elements required by an organism in minute quantities. |
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Term
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Definition
| Smallest unit of matter that still retains the properties of an element. |
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Definition
| Dense core of an atom in which that is packed together by protons and nuetrons. |
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Term
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Definition
| Measurement of atoms and subatomic particles |
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Term
Mass of Nuetron and Electron |
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Definition
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Term
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Definition
| The sum of the protons and the nuetrons in the nucleus of an atom. |
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Term
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Definition
An atom in this stage has a neutral charge because the number of protons equals the number of electrons. |
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Term
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Definition
| If electrons are found in the lowest available energy levels, the atom is said to be in this state. |
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