Neutrons do not have a net electrical charge, in other words they are electrically neutral. On the other hand, electrons have a negative charge, and they do repel each other since like charges repel. This is the same for protons except that protons are positively charged.
Only when very close to each other. This is not because of the electric force, it is because of the "strong force," or the emission and absorption of gluons between them. This also happens between neutrons and protons.
The number of neutrons is different.
Neutrons do not have a charge.
The number of neutrons is different.
Only hydrogen has un-isotopic atoms without a neutron. Hydrogen can sometimes though have one or so neutrons in its isotopes. The other elements must have neutrons to keep the protons from repelling each other in the atom's nucleus.
no they repell
The two magnets would repell each other.
I think your question is garbled. Two people can repell each other, meaning that they have a mutual dislike, but they cannot repeal each other. Only laws can be repealed, and two laws cannot repeal each other. You could also be talking about magnets. Two north poles, or two south poles repell each other, meaning that they push each other away.
Unlike charges attract each other. This is due to the force of attraction between positive and negative charges.
They would either come togrther or repell apart
yup
not at all
Depending on their relative orientation, two magnets may attract or repel each other. However, the magnetism in stars is usually thought to be insignificant, compared to their gravitational force.
Isotopes of the same element differ in the number of neutrons. Isotopes have different physical properties but similar chemical properties.
Only when very close to each other. This is not because of the electric force, it is because of the "strong force," or the emission and absorption of gluons between them. This also happens between neutrons and protons.
Protons and neutrons attract each other through the strong nuclear force, which is mediated by particles called mesons. This force overcomes the electromagnetic repulsion between the positively charged protons.
The two negatively charged particles will repel each other due to their like charges. This repulsion will cause the particles to move away from each other in an attempt to minimize the potential energy of the system.