Question

To find the mass defect for uranium-238 several calculations must be made. which is the calculation that should be made first? assume atomic number for uranium-238 is 92. 92(1.0073) x 92(1.0087) = 92(1.0073) x 146(1.0087) = 146(1.0073) x 238(1.0087) = 238(1.0073) x 238(1.0087) =

Answer 1

B) 92(1.0073) x 146(1.0087) =

Answer 2

Answer : Option B) 92 (1.0073) x 146 (1.0087)

Explanation : The element uranium 238 contains 92 protons in it and 146 neutrons. The mass of proton is assumed to be 1.077

To find the mass defect we can use the first step as adding the masses of each proton and of each neutron that make up the nucleus of uranium - 238,

then we need to subtract the actual mass of the nucleus from the combined mass of the components to obtain the mass defect.

Therefore,

92 (1.0073) x 146 (1.0087) is the correct option.