For a neutral atom containing 6 electrons and 7 neutrons, the number of protons would be .
The value of A for a neutral atom is 25 and Z is 12; find the number of protons, neutrons and electrons in the atom.
The nucleus of an atom has 5 protons and 6 neutrons. What would be the (a) atomic number, (b) mass number, (c) the number of electrons, and (d) the number of valence electrons, per atom of this element?