Which period (not periodS) is older than the Triassic period? 1.Cambrian 2.Cretaceous 3.Jurassic 4.Paleogene

Amillion dollars

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