Question

what is difference between 2N and N2
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Answer 1

Answer:

2N means two molecules of Nitrogen atom.

N2 means two atoms of nitrogen in its one molecules.

Answer 2

We'll refer N as any random element, but otherwise, this symbol is used to represent the Nitrogen element.

$\sf{2N}$: 2 molecules of any random element, or Nitrogen

$\sf{N_{2}}$: 2 atoms in 1 molecule of any random element, or Nitrogen