Before cell division, the genetic material must
undergo a process called
1 reduction
2 disintegration
3 replication
4 reproduction

Very hard to understand

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass