An atom of sodium-23 (atomic number = 11) has a positive charge of +1. Given this information, how many
electrons does it have? How many protons and neutrons does this atom have?
It has a 10 electrons. Since it's atomic number is 11 it must have 11 protons. Also, given that it has a +1 charge, it has one less electron than protons since they have equal but opposite charges.
The number of protons is the mass number minus the atomic number = 23-11= 12 neutrons.
