Question

Pls answer this question it's a bit urgent hope you answer the ​

Answer 1

Answer:

Neutron Number-12.

Mass Number-12.

Proton Number-17.

Explanation:

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Answer 2

Answer:

Na means sodium 23-11=12 is the neutron number.

C means carbon mass number is 12.

Cl means chlorine 17 is proton number.