Sagot :
Answer:
neutron
Explanation:
because a neutron is comprised of 2 down quark and 1 up quark. The 1 up quark has a charge of +2/3 and the 2 down quarks each have charge of -1/3. And when we do the math, 2/3 (-1/3 + -1/3) = 2/3 - 2/3 is equals to 0.