When radium-224 emits an alpha particle,the remaining daughter nucleus is which of the following?
A)lead-213
B)actinium-215
C)radon-220
D)bismuth-215

Question

Quizplus · Accepted Answer

When radium-224 emits an alpha particle (which consists of 2 protons and 2 neutrons), its atomic number decreases by 2 (from 88 to 86, becoming radon) and its mass number decreases by 4 (from 224 to 220), resulting in radon-220.

When Radium-224 Emits an Alpha Particle,the Remaining Daughter Nucleus Is