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14 Cards in this Set
- Front
- Back
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What is an atom?
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The basic unit of matter
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Where is the nucleus located?
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In the center of the atom
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What charge do the following have?
electron? proton? neutron? |
electron - negative
proton - positive neutron - neutral |
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What is a compound?
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a substance formed by the chemical combination of two or more elements.
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What are the four types of matter?
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solid
liquid gas plasma |
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What is a mixture?
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a material composed of two or more elements or compounds physically mixed together not chemically.
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Give 3 examples of mixtures.
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gasoline
salt water grape juice |
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The Ph scale begins at 0 and goes to what number?
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14
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What numbers represent a strong acid on the Ph scale?
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0-3
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What numbers represent a strong base on the Ph scale?
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11-14
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What number is neutral on the Ph scale?
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7
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What makes up an atom?
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protons
neutrons electrons |
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Why are atoms neutral?
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Atoms have an equal number of protons and neutrons. These particles have equal but opposite charges.
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How are elements represented?
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By a one or two letter symbol.
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