I’m a nuclear reaction which is the same before and after the change

The mass
The types of atoms
The total number of protons
The number of alpha particles

If a nuclear reaction is the same before and after the change, then the following characteristics would be conserved:

1. The Mass: The total mass of the system would remain the same before and after the reaction.

2. The Types of Atoms: The types of atoms involved in the reaction would remain the same before and after the reaction.

3. The Total Number of Protons: The total number of protons in the system would remain unchanged before and after the reaction.

4. The Number of Alpha Particles: If alpha particles are involved in the reaction, their number would also remain the same before and after the reaction.

If you are a nuclear reaction that is the same before and after the change, there are several things that remain constant:

1. Mass: The total mass of the atoms involved in the reaction will remain the same before and after the change.

2. Types of atoms: The types of atoms involved in the reaction will also remain the same throughout the process.

3. Total number of protons: The total number of protons in the nucleus of the atoms involved in the reaction will be conserved.

4. Number of alpha particles: If alpha particles (helium-4 nuclei) are present in the reaction, their number will not change throughout the reaction.

It's important to note that while the above properties remain constant in some nuclear reactions, there are various other types of nuclear reactions where these properties may change.