Respuesta :

The missing element  : ₇¹⁴N

Further explanation

Given

Reaction

₆¹⁴C ⇒X + ₋₁⁰e

Required

The missing element

Solution

Radioactivity is the process of unstable isotopes to stable isotopes by decay, by emitting certain particles,  

  • alpha α particles ₂He⁴
  • beta β ₋₁e⁰ particles
  • gamma particles ₀γ⁰
  • positron particles ₁e⁰
  • neutron ₀n¹

In a decay reaction, the sum of the mass number and atomic number before and after the decay is the same.

The element X :

Atomic number = 6 + 1 =7

Mass number = 14 + 0 = 14