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6 Cards in this Set
- Front
- Back
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What are isotopes
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Atoms that have the same number of protons but different numbers of neutrons
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A property of metals is high thermal conductivity, which means
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The ability of an object to transfer heat
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What are semimetals?
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Elements whose properties are hard, brittle, and somewhat reactive.They have properties of metals and nonmetals.
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The property of reactivity means
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Able to spontaneously emit radiation.
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What are the three particles that make up atoms?
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Neutrons, electrons, and protons.
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What is the atomic mass of an element?
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The average mass of an element’s atoms
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