15
There are similar number of electrons and protons. it has 15 electrons and protons.
none!
There are 18 protons in an Aragon atom.
An atom of copper has 29 protons.
An atom of carbon has 6 protons.
An atom of chlorine has 17 protons.
there are 12 protons in an atom of magnesium:-)
There are 26 protons in the atom of iron.
A technetium atom has 43 protons.
A sodium atom has 11 protons.
there are 7 protons in each nitrogen atom.
There are 9 protons in the element fluorine.