Question

Find the number in standard form for the following expansions:

The radius of a hydrogen atom is 2.5 × 10⁻¹¹ m 

Answer 1

Radius of a hydrogen atom = 2.5 × 10⁻¹¹ m 

= `2.5 xx 1/10^11 "m"`

= `2.5/10^11 "m"`

= 0.000000000025 m