Question

An atom of radon gas emits an alpha particle as shown below. Radon-222 has 86 protons and 136 neutrons. What daughter product will form from this decay?

A) Francium-222 (87 protons)
B) Polonium-218 (84 protons)
C) Radium-226 (88 protons)
D) Lead-220 (82 protons)

Answer 1

It will release neutrons in the form of radioactive energy.

Answer 2

Here is ur answer

I'm guessing that you want the decay product of Radon-222 after emission of an alpha particle. The alpha has two protons and two neutrons, so the resulting nucleus will have mass 218. Radon has 86 protons, so the resulting nucleus will have 84 protons - that's Polonium. Therefore

Radon-222 -->1 alpha particle + Polonium-218