WAEC - Physics (1998 - No. 54)
A radioactive nuclide of proton number X emits a \(\beta\)-particle to form a new nuclide to proton number Y. The correct equation relating X and Y is
X = Y - 1
X = Y + 1
X = 1 - Y
X = \(\frac{1}{y}\)
X = Y
Explication
There is an increase in proton number by one in a beta-decay.