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.
The nuclear model of the atom was first suggested by Rutherford in 1910. The first exploration of the structure of atom was made by Rutherford by making use of $\alpha$ particles.he Rutherford atomic model features are as follows. 1  Mass and positive charge of the atom are concentrated in the nucleus the size of which is of the order of 10 -15 m = 1 Fm. 2  Negatively charged electrons revolve about the nucleus in a cloud, the radius of which is of the order of 10 -10 m = 1A o.