An atom has a mass number of 24 and 13 neutrons. What is the atomic number of this atom?

2 answers:

6 0

A=Mass number=24
N=neutrons=13
Z=atomic number.

A=Z+N

24=Z+13
Z=24-13
Z=11

The atomic number is 11, and this atom is sodium.

Lady_Fox [76]3 years ago

3 0

11,the numbers of protons and electrons are always equal in an atom,the numbers of protons tell us about atomic number of element
mass number=no. of P+no. of N
here,24
no. of P(atomic number)=24-13=11

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