Question

Why are halogens colored?

Answer 1

We know that the name "halogen" signifies "salt-creating". At the point when incandescent light responds with metals, they produce a wide scope of salts, including calcium fluoride, sodium chloride (normal table salt), silver bromide and potassium iodide.
The halogens are the lone intermittent table gathering that contains components in three of the principle conditions of issue at standard temperature and pressing factor. The entirety of the incandescent lamp structure acids when attached to hydrogen. Most incandescent lamps are normally created from minerals or salts.

Complete answer:
The halogen is very different. It incorporates components that happen in three distinct conditions of issue at room temperature. Fluorine and chlorine are gases, bromine is a fluid, and iodine and astatine are solids. Incandescent lamp likewise fluctuates in shading, as you can find in the figure beneath. Fluorine and chlorine are green, bromine is red, and iodine and astatine are almost dark. Like different nonmetals, incandescent light can't lead power or warmth. Contrasted and with most different components, incandescent lamps have generally low dissolving and limits.
The explanation for the shade of the halogen is their capacity to retain distinctive quanta of radiations that lie in the apparent district. This commonly brings about the excitation of external electrons to higher energy levels, bringing about various shadings.

Note:
We have to know that the halogen is among the most receptive of all components, in spite of the fact that reactivity decays from the top to the lower part of the halogen group. Since all incandescent light have seven valence electrons, they are "excited" to acquire one more electron. Doing so gives them a full external energy level, which is the steadiest plan of electrons. Halogens regularly join with antacid metals in group 1 of the intermittent table. Salt metals have only one valence electron, which they are similarly "anxious" to give. Responses including incandescent light, particularly halogen close to the highest point of the gathering, might be unstable.