Decay equations Flashcards
Give two reasons why a nucleus could decay
- If nucleus if filled with too many protons + neutrons, they will fall off.
- If the nucleus is too large
What types of radiation will be emitted if the nucleus is too large or if there are too many neutrons?
- Nucleus too large –> emitt alpha particle
- Too many neutrons –> emitt beta particle
How is an alpha particle represented?
- Mass number: 4
- Proton number: 2
What happens to the mass and proton number in alpha decay?
- Mass number decreases by 4
- Atomic (proton) number decreases by 2
What is the general equation for alpha decay?
A A-4 4
X —> Y + α
Z z-2 2
What is the atomic mass of an emitted alpha particle?
Atomic mass = 4
What is the number of neutrons in an alpha particle?
Neutrons = 2
What happens during beta decay?
A neutron changes into a proton.
A high speed electron is emitted.
What is the mass number of a beta particle?
0
What is the proton number of a beta particle?
-1
What happens to mass and proton number in beta decay?
Mass number: stays the same
Proton number: increases by 1.
What is the general equation for beta decay?
A A 0
X –> Y + β
Z z+1 -1
