The "work principle" for real machines can be defined as, "The work accomplished by a machine will always be less than the work needed to operate the machine."

True
False

Acertain atom has 22 protons and 19 electrons. this atom loses an electron. the net charge on the atom is now 4+1+01-4-. if this same atom with 22 protons and 19 electrons were to gain 3 electrons, the net charge on the atom would be 3+2+02-3-.