atoms and matter
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| homogeneous mixture | a mixture in which two or more substances are not evenly mixed but not bonded together
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| matter | any thing that has a mass and takes up space
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| elements | substance made of only one kind of atom
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| atom | a small particle that is the building block of matter
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| compound | substance made of two or more elements that are chemically joined in a specific combination
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| heterogeneous mixture | a mixture in which the substances are not evenly mixed
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| molecule | two or more atoms that are held together by chemical bonds and act as a unit
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| substance | matter with a composition that is always the same
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| proton | positively charged particle in the nucleus of an atom
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| electron cloud | region surrounding an atom's nucleus where one or more electrons are often found
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| electron | negatively charged particle that occupies the space in an atom outside the nucleus
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| isotope | one or more atoms of an element having the same number of protons but a different number of neutrons
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| nucleus | region at the center of an atom that contains most of the mass of an atom
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| ion | an atom that has a charge because it has gained or lost electrons
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| atomic number | then number of protons in the nucleus of an atom of an element
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| neutron | uncharged particle in the nucleus of an atom
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