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17 Cards in this Set
- Front
- Back
what is a mixture?
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a physical blend of two or more substances that are not chemically combined
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How many energy sublevels are in the second principal energy level?
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2
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what is pure chemistry?
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pursuit of chemical knowledge for its own sake
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what are the 5 types of chemistry?
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organic, inorganic, biochemistry, analytic, physical
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what is not matter?
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energy
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what is applied chemistry?
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research that is directed toward a practical goal or application
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what is the scientific method?
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logical, systematic approach to the solution of a scientific problem; steps in the scientific method include making observations, testing hypotheses, and developing theories.
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what is scienitific law?
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a concise statement that summarizes the results of many observations and experiments
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what are the states of matter?
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solid, liquid, gas
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what are some examples of physical change?
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tearing up a piece of paper
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what are some examples of chemical change?
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burning a piece of paper
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what is accuracy?
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close to right answer
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what is precision?
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repeated measurements to-- closeness
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what does the quantum mechanical model involve?
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the probability of finding an electron in a certain position
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Which scientist developed the quantum mechanical model of the atom?
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Erwin Schrodinger
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Which color of visible light has he shortest wavelength?
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green
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How does the speed of visible light compare with the speed of gamma rays, when both speeds are measured in a vacuum?
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the speeds are the same
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