1. An isotope of gallium, 67Ga, has an atomic number of 31 and a half-life of 78 hours. Consider a small mass of 3.5 gra

[answerhappygod]

1. An isotope of gallium, 67Ga, has an atomic
number of 31 and a half-life of 78 hours. Consider a small mass of
3.5 grams for 67Ga which is initially pure.
What is the decay rate of the gallium after 48 hours?
R1 =
2. A certain atom has atomic number Z = 23 and atomic mass
number A = 48.
What is the approximate radius of the nucleus of this atom?
rnucleus =
What is the magnitude of the electrostatic force of repulsion
between two protons on opposite sides of the diameter of the
nucleus.
F =