Question

How many subatomic particles would a neutal atom have if its atomic number was 23 and its mass number was 57?

Answer 1

Answer:

e) 34 neutrons 23 protons and 23 electrons ​

Explanation:

Atomic number = number of electrons = number of protons

So the atom contains 23 protons and 23 electrons

To find the number of neutrons we make use of the formula  

Mass number - atomic number = number of neutrons

So 57 - 23 = 34 neutrons

Atom contains 23 protons , 23 electrons and 34 neutrons

Option e is the answer .