Rules of Significant Figures

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Helping flash cards for the Honors Chemistry lesson over significant figures and scientific notation.

Non-zero digits are _________ significant. If there are no zeros in the number, then ________ _________ is significant.

Always; every digit

All zeros between other significant digits are _________.

Significant

If there is a decimal point, you start from the ________.

Left

If there is no decimal point, you start from the ________.

Right

The number of significant figures is determined starting with the ______________ ____-________ digit.

Leftmost non-zero

If a number ends in zeros to the right of the decimal point, those zeros are all __________.

Significant

Zeros to the left of the of the first non-zero number are ____________.

Insignificant

3 = ±____.
2.53 = ±____.
2.531 = ±____.
2.5315 = ±____.
2.53156 = ±____.

3 = ±1
2.53 = ±0.01
2.531 = ±0.001
2.5315 = ±0.0001
2.53156 = ±0.00001

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