Question

The radius of the oxygen nucleus `._(8)^(16)O` is `2.8 xx 10^(-15)m`. Find the radius of lead nucleus `._(82)^(205)Pb`.

Answer 1

`R_(0) = 2.8 xx 10^(-15)m, A_(0) = 16, A_(Pb) = 205 R prop A^(1//3)`
`(R_(0))/(R_(Pb)) = ((A_(0))/(A_(Pb)))^(1//3) = (2.8 xx 10^(-15))/(R_(Pb)) = ((16)/(205))^(1//3)`
`R_(Pb) = 6.55 xx 10^(-15)m`.