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Question
Express the following in standard form:
A Helium atom has a diameter of 0.000000022 cm.
Solution
A helium atom has a diameter of 0.000000022 cm.
Standard form of 0.000000022 cm = 0.22 × 10–7
= 2.2 × 10–7 × 10–1 ...[∵ am × an = (a)m + n]
= 2.2 × 10–8 cm
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