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18 Cards in this Set
- Front
- Back
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electron
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a negatively charged partical in an atom
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proton
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a positively charged partical in the nucleus of an atom
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neutron
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a particle in the nucleus of an atom that has no electric charge
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atomic number
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the number of protons in the nucleus of an atom of an element
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chemical bond
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a force, or link, that holds atoms together in a molecule or in a crystal
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radioactive element
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an element made up of atoms whose nuclei break down, or decay, into nuclei of other atoms
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base
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a compound that turns red lithmus paper blue and that forms an acid when it reacts with an acid
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indicator
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a substance that changes color when mixed with an acid or a base
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chemical change
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a change in matter that results in new substances with new properties
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acid
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a compound that turns blue lithmus paper to red and forms a salt when it reacts with a base
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ion
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an electrically charged atom
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neutralization
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the reaction between an acid and a base
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nuclear fission
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the splitting of the nucleus of an atom, releasing great amounts of energy
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polymer
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a compound consisting of large molecules formed from many smaller, linked molecules
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model
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something used or made to represent an object or idea
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nucleus
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the dense central part of an atom
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Physical change
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a change in the size, shape, or state of matter, with no new kind of matter being formed
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salt
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a compound that can be formed when an acid reacts with a base
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