Question

Suppose the radius of a copper nucleus is 10−14 m and the radius of the copper atom is about 0.1 nm. Estimate the atom's radius if the nucleus was the size of a pin head (about 1 mm).

Answer 1

Here,

let the estimated radius of the atom is R1

Now , using unit method

R1/0.001 = 0.1 *10^-9/(10^-14)

R1 = 10 m

in this case , when the nucleus is the size of pinhead ,

the atom's radius is 10 m