Neutrons are found in the nucleus and separate the other particles so that the strong force can hold the nucleus together. which particles are positively charged and need to be separated so that they don't repel? a) electrons b) neutrons c) protons d) quarks

C) protons

Explanation:

The atom of most elements have proton and neutron located in the nucleus while the electron resides in the outer part of an atom.

The proton are usually positively charge and tends to repel one another in the nucleus of an atom. The reason for the repel of the proton is the positively charged nature. The neutron has no charge because they are neutral. The neutron are usually heavier than the proton . The sum of the proton and neutron contributes mostly to the mass of an atom. The electron that revolves and reside at the outer part of an atom is negatively charge.

The picture above is a representation of how the proton, electron and neutron is located in an atom.  

a polar bond is formed when electrons are shared unevenly between atoms

a electronegativity decreases beacuse the size of nucleus is bigger.