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5 Cards in this Set
- Front
- Back
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Explain the relationship among atoms, elements, and compounds.
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Elements are made of atoms.
Compounds are made of atoms of 2 or more elements combined |
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What is a radioactive isotope? Describe two scientific uses of radioactive isotopes
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Radioactive isotopes have unstable nuclei and break down at constant rates over time. Treating cancer, killing bacteria in food
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How are atoms in a compound held together?
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By a chemical bond
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Distinguish among single, double, and triple covalent bonds
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2 electrons - single
4 electrons - double 6 electrons - triple |
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Explain the properties of cohesion and adhesion. Give an example of each property
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Cohesion- attraction between molecules (drops of water forming beads on smooth surface. Adhesion- attractiosn between different substances ( capillary action)
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