1 The average monthly Social Security benefit paid to retired workers in 2015 is $1,335.97, or $16,031.64 a year. 2  The average monthly Social Security benefit paid to widows & widowers is $1,282.25, or $15,387.00 per year.
Like all hadrons, neutrons are made of quarks. A neutron is made of two down quarks and one up quark. One up quark has a charge of +2/3, and the two down quarks each have a charge of -1/3. The fact that these charges cancel out is why neutrons have a neutral (0) charge. Quarks are held together by gluons.
The positive charge of protons cancels the negative charge of the electrons. Neutrons have no charge. With regard to mass, protons and neutrons are very similar, and have a much greater mass than electrons. Compared with neutrons and protons, the mass of an electron is usually negligible. Spin is associated with the rotation of a particle.