Question

the atomic number of sodium is 11 and it's mass number is 23 it has
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Answer 1

Answer:

The mass number of an element tells us the number of protons AND neutrons in an atom (the two particles that have a measurable mass). Sodium has a mass number of 23amu. Since sodium has 11 protons, the number of neutrons must be 23 – 11 = 12 neutrons

Explanation:

Answer 2

Sodium has a mass number of 23amu ,since sodium has 11 protons,the number of Neutron must be 23-11=12 neutron.....

I hope you understand it......