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15 Cards in this Set
- Front
- Back
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What is a heterogeneous mixture?
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not having a uniform composition throughout.
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What is a pure substance?
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A fixed composition and differs from a mixture. An element.
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What is an example of a heterogeneous mixture?
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kool-aid, salad
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What is the 18th group on the periodic table called?
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Noble gases
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what group number are the halogens?
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17
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What are valence electrons?
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Electrons in the outermost shell
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What is the sum of the oxidation numbers?
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8
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What is a chemical property?
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The ability of a substance to undergo a change that transforms the substance
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What is an example of a physical change?
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Cutting hair, freezing water
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What is an electrolyte?
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A substance that is dissolved in water to make an electric current
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What is the charge of the alkaline metals?
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+1
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What group in the periodic table are the most reactive non-metals?
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Halogens
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What is the best way to dilute acids?
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Slowly add water
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Name 2 examples of proper attire for a lab.
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Hair up, goggles, no loose clothing, gloves, apron, closed toed shoes, etc....
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What is the neutral solution of a pH?
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7
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