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.
space around the nucleus & predicted the existence of neutrons & discovered that most of an atoms mass is in itâs nucleus which is small, dense positively charged. year 18711937 Bohr Stated that electrons can only travel at specific distances from the nucleus. The electrons were arranged within this substance. 1898: Ernest Rutherfordâs model of the atom was the nuclear model. Atoms of one element differed from that of another atom.