If $W$ is the atomic weight and $N$ is the atomic number of an element,then:

• A
  Number of $e^{-} = W - N$
• B
  Number of $_{0}n^{1} = W - N$
• C
  Number of $_{1}H^{1} = W - N$
• D
  Number of $_{0}n^{1} = N$