Question #43205

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Question #43205

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Answer 1 · 2017-10-25T15:29:53

$Z = 7$ $Z = 7$
$E = 7$ $E = 7$
$N = 13$ $N = 13$

Explanation:

The atomic number $Z$ $Z$ is the same as the proton number, so we know that nitrogen must by definition have $7$ $7$ protons.

If it is an atom, and not an ion, then it must have $Z = E$ $Z = E$ , protons equals electrons, so it must also have $7$ $7$ electrons for no overall charge.

The mass number is given by $A = Z + N$ $A = Z + N$ , protons plus neutrons, so we can say that $N = A - Z$ $N = A - Z$ , neutrons is mass minus protons, so there are $20 - 7 = 13$ $20-7=13$ neutrons.

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Question #43205

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