Mass of the dust particle is 0.0000000007 kg, In standard form, it can be written as:

7 \times 10^{7}

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7 \times 10^{- 7}

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7 \times 10^{10}

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7 \times 10^{- 10}

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Solution

The correct option is D $7 \times 10^{- 10}$
Mass of the dust particle = 0.0000000007
It can be written in the standard form by moving the decimal point from the left to the right most position, and count the number of places it has moved.
The number of places decimal point moves is ‘10’.
0.0000000007 = $7 \times 10^{- 10}$

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