Answer:
A. 18
Explanation:
Sulfur number sixteen forms a negative
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<span>The balanced nuclear equation for the beta minus decay of Co-60:
</span>The decay is initially to an excited state of Nickel-60 . After which it emits one or two gamma ray to reach the stab;e state i.ie ground state of the Nickel 60 isotope<span>.
See image below </span>
Because it means the iron is becoming very weak. The more rust = weaker
N=V/Vm
n - the number of moles
V - the volume
Vm=22.4 L/mol - the standard molar volume of gas