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.
The transition metals are found in groups 3 through 12. You may notice that we are leaving out that 'island' of elements down below. The top row of that island makes up the lanthanides and the bottom row makes up the actinides. We are leaving these out because they are neither main group elements nor transition metals. Main Group Elements. The main group elements are by far the most abundant elements - not only on Earth, but in the entire universe. For this reason, they are sometimes called the 'representative elements.' The main group elements are found in the s- and p-blocks, meaning that their electron configurations are going to end in s or p. Remember the s- and p-blocks are responsible for providing the valence electrons, those super-important electrons that are involved in chemical bonding. Both the electron configurations and the number of valence electrons are very predictable as we move across the main group elements. Group 1 has elements with one valence electron, group 2 has elements with two, group 13 has elements with three valence electrons and so on to group 18, with eight valence electrons.