Question

For the real or imaginary nucleus of ₈₄X¹⁹⁹, find (a) the net electrical charge of the nucleus, (b) the number of neutrons, (c) the number of nucleons, (d) the approximate radius of the nucleus, and (e) the nuclear density.

Answer 1

ans)

from above data that

given that 84 X 199

(a)

number of protons= 84

net electrical charge on nucleus= 84 (1.6 x 10^-19)=1.344 x 10^-17 C.

(b)

number of nuetrons = A-Z

n= 199-84

n=115.

(c)

number of nucleons= 199

(d)

radius= r= ro A ^1/3

r= 1.2 x 10^-15 (199 )^1/3 .

r=6.99 x 10^-15 m

(e)

density= mass of nucleus/(4/3 r ³)

density=199 (1.672 x 10^-27)/[(4/3)(6.99 x 10^-15)³]

density=2.33 x 10 ¹⁷ kg/m ³