Approximately the diameter of proton is 0. 000 000 000 001 m. How do we express it in Scientific Notation?

Question

A. 1 x 10⁻¹¹ m

B. 1 X 10⁻¹² m

C. 1 x 10¹² m

D. 1 x X 10¹¹ m

Answer 1

Count right from the decimal point to the first number and you get 12. The answer then must be a negative exponent so we get B which is 1 x 10^-12