Question

Question 5 of 25Radium-228 decays by alpha decay. Part of the nuclear equation is shownbelow. Fill in the blank with a number.Answer here88Ra→He +6Rn

Answer 1

In atomic notation, the number at the top represents atomic mass (the combined number of protons and neutrons). Two atoms that split from a larger atom must have the same combined atomic mass as the original atom.

228 = 4 + ?

? = 224