What would happen if a non native species is introduced into the food web

Simply put it could die off by not being able to compete with native species for resources. Or it could out compete the native species.

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