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10 Cards in this Set
- Front
- Back
Atom
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The smallest unit of matter that retains the properties of an element
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Neutron
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A subatomic particle having an electrical charge (electrically neutral), with a mass of about 1.7 x 10-24g, found in the nucleus of an atom
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Electron
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A subatomic particle with a single negative electrical charge, and a mass about 1/2000 that of a neutron or proton. One or more electrons move around the nucleus of an atom
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Protons
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A subatomic particle with a single electrical charge, with a mass of about 1.7 x 10-24 g, found on the nucleus of an atom
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Atomic nucleus
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An atoms dense central core, containing protons and neutrons
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Mass number
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The sum of the number of protons and neutrons in an atoms nucleus
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Atomic mass
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The total mass of an atom, which is the mass in grams of one mole of the atom.
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Isotopes
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One of severa atomic forms of an element, each wuth the same number of protons but different number of neutrons, thus differing in atomic mass
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Radioactive Isotope
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An isotope that is unstable, the nucleus decays spontaneously, give off detectable particles and energy.
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Energy
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The capacity to change things, especially to do work and move matter against opposing force.
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