An atom of nitrogen has seven protons in its nucleus. How many electrons does it have?

1 Answer
Jan 23, 2017

Atomic nitrogen is NEUTRAL............


And thus if it has 7 protons, 7 fundamental, massive, positively charged particles in its nucleus, neutrality demands 7 fundamental, negatively charged particles, whizzing about the nucleus. What do we call these blighters?

But hang on! The atomic mass of nitrogen is #"14 amu"#. Electrons have negligible mass, so how do you account for the discrepancy between proton mass (#"7 amu"#) and atomic mass?