atomic number = number of proton in an element
number of proton = number of electron
mass number = number of proton + number of neutron
therefore...
atomic number = mass number - number of neutrons
No. of neutrons=Atomic mass - Atomic number
atomic mass-atomic number
There is no need for a formula. The atomic number of an element is the same as the number of protons in the atom. e.g. chlorine has the atomic number 17 so its atom has 17 protons.
atomic number or atomic weight. Subscript: atomic number, superscript: atomic weight: 94Pu239 or 239Pu
atomic number or atomic weight. Subscript: atomic number, superscript: atomic weight: 94Pu239 or 239Pu
number of electrons
number of electrons
water is not an element. it don't have an atomic number. its molecular formula is H2O.
It is the same as the atomic number of the element.
Atomic number of magnesium = 12 Atomic number of oxygen = 8 Formula of magnesium oxide = MgO = atomic number of 20(12+8)
Ammonium is a polyatomic ion, not an element and thus it does not have an atomic number. It is composed of nitrogen and hydrogen and has the formula NH4+. Nitrogen has the atomic number 7. Hydrogen has the atomic number 1.
atomic number = number of proton in an element number of proton = number of electron mass number = number of proton + number of neutron therefore... atomic number = mass number - number of neutrons