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An atom having atomic mass number 13 has...

An atom having atomic mass number 13 has 7 neutrons. What is the atomic number of the atom.

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An atom having atomic mass number 13 and number of neutrons 7.
i.e. `A=13,n=7`
As we know that A=n+p
`therefore` p=A-n=13-7=6
Hence, z= p =6
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