An atom has a mass number 23 and an atomic number 11. The atom has ____ electrons

Atomic number (Z) = Number of protons = Number of electrons. Therefore, the atom has 11 electrons.

How to find electron, neutron and proton number present in an atom?

The above question has given that the mass number of an atom = 23

The atomic number of atom = 11

As, no. of electrons in an atom is equal to the atomic number of the elements.

So, the number of electrons = 11

Then the number of protons is equal to the number of electrons.

so, number of protons = 11

And number of neutrons = mass number – atomic number = 23−11 = 12

so, number of neutrons = 12