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| Compounds that form H+ ions when dissolved in water and have a pH of less than 7. |
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| pH: The power of Hydrogen, is a measure of the acidity or basicity of an aqueous solution. |
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| BASE: A substance that forms OH- ions when dissolved in water and have a pH greater than 7 |
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| STRONG NUCLEAR FORCE: Holds the protons and neutrons together in the nucleus |
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| HALF LIFE: The time it takes for one-half of the original amount of material to react. |
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| RADIOACTIVE: A property of certain elements (usually large), of spontaneously emitting radiation resulting from changes in the nuclei of atoms of the element. |
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| NEUTRAL(IZED): When an acid and a base react to form water and a salt and involves the combination of H+ ions and OH- ions to generate water has a pH equal to 7. |
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ELECTROMAGNETIC FORCE: Acts between charged particles, keeps the electrons in the atom. |
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| DECAY: Changing into isotopes of the same element, or into completely different elements. |
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| INDICATORS: Any substance that gives a visible sign, usually by a color change, of the presence or absence of an acid or base. |
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