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Find the scientific notation for each number.
1. The diameter of an atom is .00000005 m.
a) 0.5 x
10-8 m
b) 5 x 108
m
c) 5 x 10-8
m
2. The radius of an electron is .00000000000000282 m.
a) 2.82 x
10-15 m
b) 282 x
10-14 m
c) .282 x
10-15 m
3. The diameter of the smallest particle visible to the
naked eye is .0000015 m.
a) 1.5 x 10-5
m
b) 15 x
10-7 m
c) 1.5 x 10-6
m
4. The radius of a grain of sand
is 0.025cm.
a) .25 x
10-2 cm
b) 2.5 x
10-2 cm
c) 25 x 10-2
cm
5. The diameter of a proton is .000000000000002 m.
a) 2 x 10-14
m
b) 2 x 10-15
m
c) .02 x
10-14 m
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