Why is a neutron chargeless?
A neutron has no net charge because the charge of the quarks that make up the neutron balance each other out.
A neutron is made of three Quarks. Two of the Quarks have a negative charge of 1/3 each. The other quark has a positive charge of 2/3. -1/3 + -1/3 = -2/3 + 2/3 = 0.