Question

describe the trend in colour of the group 7 elements down the group

Answer 1

Hey,
Thanks for asking this question.

The group 7 elements (halogens) become darker as you go down the group.

Fluorine is very pale yellow
Chlorine is yellow-green
Bromine is red-brown
Iodine crystals are shiny purple - but easily turn into a dark purple vapour when they are warmed up.

Hope this would help you.

Answer 2

,here is ur answer.