Bases and Bubbles

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atomic number

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The number of protons in the nucleus of an atom

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mass number

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The total number of protons and neutrons in a nucleus

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protons

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Positively charged particle found inside the nucleus of an atom

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nucleus

Back

Central part of an atom that consists of protons and neutrons

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neutrons

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A particle found inside the nucleus of an atom, it has no charge (is neutral)

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electrons

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A negatively charged particle found in electron shells that move around the outside of the nucleus

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element

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A pure substance made up of only one kind of atom.

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compound

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A substance made from two or more different elements that have been chemically joined

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molecule

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Two or more atoms chemically bonded or joined together. It doesn't matter if the atoms are the same or are different from each other

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mixture

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A substance made of two or more different chemical substances that are not bonded together