An atom that has a negative four charge will have which of the following?

a.) 4 more protons than electrons
b.) an equal amount of protons and electrons
c.) 4 more electrons than protons
d.) 2 more neutrons than protons

Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton