there are ______ neutrons in the stable isotope of rhenium (re - 185).\na 110\nb 134\nc 125\nd 90
there are ______ neutrons in the stable isotope of rhenium (re - 185).\na 110\nb 134\nc 125\nd 90
Answer
Explanation:
Step1: Recall atomic number of rhenium
The atomic number of rhenium (Re) is 75.
Step2: Use neutron - mass number relationship
The number of neutrons $n$ is given by the formula $n = A - Z$, where $A$ is the mass number and $Z$ is the atomic number. For Re - 185, $A = 185$ and $Z=75$. So $n=185 - 75$.
Step3: Calculate the number of neutrons
$n = 110$.
Answer:
A. 110