Question

a hydrogen atom is about 0.1 nm in diameter, how many hydrogen atoms lined up side by side would make a line 1 cm long?

Answer 1

Explanation:

This is called scientific notation. 10^-8 is the same as 1/10^8, or 0.00000001. Note that 10^-8 has eight decimals (including the one before the decimal). 10^8, or 100000000, has eight zeros