Choose the best: Nano chemistry — task. Science State Board, Class 9.

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Select the correct answers to the following questions:

1. One nanometre is equals to _________.

\(10^-{3}\) metre
\(10^-{9}\) metre
\(10^-{7}\) metre
\(10^-{8}\) metre

2. One hydrogen atom has a diameter of about __________ nm.

\(0.02\)
\(0.2\)
\(1.99\)
\(2\)

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