The number of electrons in the nucleus of `C^(12)` is

The isotopes of an element differ in (1) The number of neutrons in the nucleus (2) The charge on the nucleus (3) The number of extra-nuclear electrons ( 4) Both the nuclear charge and the number of extranuclear electrons.

The mass number of an anion, X^(3-) , is 14. if there are ten electrons in the anion, the number of neutrons in the nucleus of atom, X_2 of the element will be

Number of electrons in the nucleus of an element of atomic number 14 is

The number of proton, neutrons and electrons in the nucleus of ._(11)Na^(23) are respectively

The number of protons, neutrons and electrons in the nucleus of "_11 Na^23 are respectively

An atom of an element has 29 electrons. The nucleus of the atom contains 35 neutrons. Find the number of protons in the nucleus and the mass number.

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 ?

Why is atomic number always calculated from the number of protons in the nucleus and not from the number of electrons present in the extra nuclear part?