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

Answer 1

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?

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Answer 2

Henry Antrim

Nitrogen atoms consist of seven electrons.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.