Significant figures

Question 1

all none zero digits are significant

Answer 1

e.g. 125= 3 sf

Question 2

place holder zeros are not significant (only applies when the no. starts w zero)

Answer 2

e.g. 0.005
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place holders

Question 3

trailing zeros are significant in the decimal part of the zero

Answer 3

e.g 0.500
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trailing zeros

Question 4

zeros between two significant figures are significant

Answer 4

e.g. 1001= 4sf

Question 5

for a number in scientific notation, sfs are countee in the number part only

Answer 5

e.g 1.25 × 10*4