Voltage and Current - Technical MCQs

Q1:

An atom with more electrons than protons is ___.

A a positive ion

B a balanced atom

C a negative ion

D not possible

ANS:C - a negative ion

An ion is a charged atom or molecule. It is charged because the number of electrons does not equal the number of protons in the atom or molecule. An atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less than the number of protons in the atom.