Signature Figures (IB Chemistry)

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5 Terms

1
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What is rule 1

All nonzero digits in a measurement are significant.

2
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What is rule 2

Zeros that appear between other nonzero digits are always significant.

3
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What is rule 3

Zeros that appear in front of all of the nonzero digits are called left-end zeros. Left-end zeros are never significant.

4
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What is rule 4

Zeros that appear after all nonzero digits are called right-end zeros. Right-end zeros in a number that lacks a decimal point are too significant.

5
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What is rule 5

Right-end zeros in a number with a decimal point are significant. this is true whether the zeros occur before or after the decimal point.