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Atom Vocabulary Crossword

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the basic unit of an element; the smallest part of a pure substance that retains the properties of that substance.

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the number of protons in an atom of a particular chemical element

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the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number al

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each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei.

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the center region of an atom (where the protons and neutrons are located).

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also called orbit a defined region outside of the nucleus where electrons are located.

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the positively (+) charged subatomic particle

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the negatively (–) charged subatomic particle located in shells outside of the nucleus.

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the neutral subatomic particle located in the nucleus of an atom; important for holding the nucleus together through the strong nuclear force.

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a particle that is part of the nucleus; a proton or neutron

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neither positive nor negative. A neutral atom has the same number of protons as electrons.

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an atom with am imbalance of electrons and protons

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a positive ion; an atom with more protons than electrons.

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a negative ion; an atom with more electrons than protons.

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