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Definition
| this group reacts by sharing or gaining one electron |
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| substances that can conduct electricity under some conditions |
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| this element is added to water to help prevent tooth decay |
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Definition
| this family can gain, lose, or share four electrons |
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Definition
| element used for filling blimps |
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Definition
| element used in fertilizers |
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Definition
| most abundant element in the Earth's crust |
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| describes an atom that occurs in pairs |
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| makes up 90% of the atoms in the universe |
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| most unreactive group of elements |
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| triatomic molecule of atom, layer in Earth's atmosphere protects us against UV rays |
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| element used to kill bacteria in water |
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Definition
| highly reactive nonmetal in matches |
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Definition
| only nonmetal that is a liquid at room temperature |
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Definition
| most common gas in the Earth's atmosphere |
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