Ch3 Flashcards: Matter and Energy

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Matter

Back

Anything in the universe that takes up space.

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Mass

Back

A measure of the amount of matter in something.

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Element

Back

A substance that cannot be broken down into other substances.

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Atom

Back

The smallest unit of an element that retains all the characteristics of that element.

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Proton

Back

A particle within atoms that has a positive charge.

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Electron

Back

A particle within atoms that carries a negative charge.

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Neutron

Back

A particle within atoms that has no electric charge.

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Isotope

Back

An atom of an element with a particular number of neutrons.

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Molecule

Back

Formed when two or more atoms (either the same or different) bond together.

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Compound

Back

A substance made of atoms of two or more elements bonded to each other.