Question

chemistry_quiz 2
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shukri.20080428@ubahstudents.org

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choose the letter of the correct answer
the diameter of a proton measures approximately 0.000000000001 mm. * 1 point
how is this number written in scientific notation?
10 x 10^12
0.1 x 10^-12
1 x 10^12
1 x 10^-12

Explanation:

Step1: Recall scientific - notation form

Scientific notation is written as $a\times10^{n}$, where $1\leqslant|a|\lt10$ and $n$ is an integer.

Step2: Rewrite the given number

The number $0.000000000001 = 1\times10^{- 12}$. We move the decimal point 12 places to the right to get a number between 1 and 10 (which is 1), and since we moved the decimal point to the right, the exponent of 10 is negative.

Answer:

1 x 10^-12 (the last option)