The negative (oxygen) end of water is attracted to the positive sodium ion in the salt, extracts it from the lattice and more water molecules surround it (i.e. dissolve it). The same is true for the positive (hydrogen) end of water and the negative chloride ion in the salt.
According to nitrogen's electron configuration table, an atom of nitrogen contains two electrons in its first energy level (both in the s sub-shell) and five electrons in its second energy level (two in the s sub-shell and three in the p sub-shell). A more accurate Bohr model of a nitrogen atom could look like this: In the refined Bohr model, a nitrogen atom has a central nucleus, composed of seven protons and seven neutrons, surrounded by seven electrons.
Asker's rating. 1  Isotopes of atoms differ in the amount of neutrons within the nucleus of the atom, the amount of protons and electrons remain the same. The most common Hydrogen atom consists of a proton and an electron giving it an atomic mass of 1. Hydrogen-2 consits of a proton and neutron nuclei and an electron having an atomic mass of 2.