Question

The nuclide ²¹⁴Pb₈₂ emits an electron and becomes nuclide X. Which of the following gives the mass number and atomic number of nuclide X?

	Mass Number	Atomic Number
(A)	210	80
(B)	210	81
(C)	213	83
(D)	214	81
(E)	214	83

Answer 1

The correct option is: (E)

Explanation:

²¹⁴Pb₈₂ → X + ⁰e_-1 … For everything to add up, we need ²¹⁴X₈₃