# How would you describe the range of the radii of most atoms in nanometers (nm)?

Jan 21, 2017

Probably off by ONE or TWO orders of magnitude.

#### Explanation:

The hydrogen atom has a radius of $5.3 \times {10}^{- 11} \cdot m$

See this site for data.

Jan 21, 2017

Well, I know that atomic radii are in general on the order of $0.500 - 2.00$ Å or so, which corresponds to $50 - 200$ $\text{pm}$ or so. For instance, the atomic radius of scandium is about $\text{160 pm}$.

In terms of $\text{nm}$, then, you should get a typical approximate ATOMIC radius of:

100 cancel"pm" xx cancel"1 m"/(10^12 cancel"pm") xx (10^9 "nm")/cancel("1 m")

$=$ $\text{0.100 nm}$

Thus, a typical range of ATOMIC radii would be $\textcolor{b l u e}{0.050 - 0.200}$ $\textcolor{b l u e}{\text{nm}}$ or so.