What is the nuclear binding energy for a mole of helium, He-5,
whose atomic mass is 5.01222? (1 mol p+ = 1.00728 g,
n0 = 1.00866 g, c=3.00x108m s-1,
and 1 J=1 kg m2 s-2)
2.72x1017J
2.72x1014J
2.55x1012J
2.55x1015J
A radioisotope has a 30-second half-life. After one and a half
minutes there will be
50% left
25% left
12.5% left
0% left
For a radioisotope whose half-life is 5 minutes, after two
half-lives there is left
nothing
75% of the...