Itâs a good idea to start thinking in these terms because itâs fundamental to making an entire painting read right with depth recession. Here is the definition for hue, value and chromatic intensity. 1  HUE: In painting color theory, a hue refers to a pure color â one without white or black pigment added to it. 2  Color and hue in painting mean the same thing to most artists. 3  The primary hues are red, yellow and blue.
In chemistry and atomic physics, the main group is the group of elements whose lightest members are represented by helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, and neon as arranged in the periodic table of the elements.
For main group elements it is the number of the group. For transition elements it is variable. Count the groups, from the left, omitting the transition elements and you have the number of valence electrons. If you can write the electron configuration of the element it is the total of the s and p electrons for main group elements. For the transition elements, again it is variable, except for silver many of these elements have variable oxidation states.