A silicon atom has an atomic radius of 111 pm111\text{ pm}111 pm.
What is the diameter of this silicon atom in metres, expressed in standard form?
1.11×10−10 m1.11 \times 10^{-10}\text{ m}1.11×10−10 m
2.22×10−10 m2.22 \times 10^{-10}\text{ m}2.22×10−10 m
2.22×10−12 m2.22 \times 10^{-12}\text{ m}2.22×10−12 m
2.22×10−14 m2.22 \times 10^{-14}\text{ m}2.22×10−14 m
