They are found in all three states of existence. Here are some other physical properties of halogens that make them a very unique family of elements. Appearance Appearance wise fluorine exists as a pale yellow gas that is poisonous in nature, while chlorine is similarly poisonous but exists as a pale green colored gas.alogens range from solid (I2) to liquid (Br2) to gaseous (F2 and Cl2) at room temperature. The chemical properties are more uniform. The halogens have very high electronegativities. Fluorine has the highest electronegativity of all elements.
An example of a phenotypic trait is hair color; there are underlying genes that control the hair color, which make up the genotype, but the actual hair color, the part we see, is the phenotype.
These numbers refer are codes for the colors achieved through the use of the dye in question. Specifically, the numerals refer to the light-level of the color in question. When gauging haircolor, a scale of 1 to 10 is used to represent the lightness of the color of the hair. 1 is the darkest possible color level and would be a dark, dark brown or black, while a 10 represents the lightest possible color and would be a platinum or pale yellow blonde. The exact color achieved is determined by the lightness level and base colors in the hair dye. Knowing this allows you to know that a level 3 with a red base color would probably be a rich warm color like an auburn or chestnut brown.