The differences are <u>the number of neutrons</u> and the <u>atomic mass</u><u /><u />.
Copper-63 has an atomic mass of 63 amu, and has 34 neutrons.
Copper-65 has an atomic mass of 65 amu, and has 36 neutrons.
The question is already answered.
Answer: Half-life of the substance is 16 years.
Explanation:
Expression for rate law for first order kinetics is given by:
where,
k = rate constant
t = age of sample = 48 years
a = initial amount of the reactant = 240 micrograms
a - x = amount left after decay process = 30 microgarms
b)
of reaction
Thus half-life of the substance is 16 years.