Question

what is meant by gradation in Halogens.?

Answer 1

The non-metallic elements Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I) and Astatine (At) are grouped together to form group 17 of the Periodic Table. Their salts are present in sea-water and hence they are collectively known as halogens (Greek, Halos means sea salt producers). The group collectively is called halogen family. All halogens precede the noble gases in the periodic table because their atoms contain one electron less than the electronic configuration of the inert gas. They have very strong tendency to acquire stable inert gas configuration by accepting one electron. For this reason halogens exhibit non-metallic behaviour. Astatine the last member of halogen family is a radioactive element with a very short life. All other halogens are abundant in nature in the combined state.

Answer 2

Answer:

The group 17 contains the members of halogen family. all the general formula X2 a graduation is observed in the their physical state down the group.the non_ metallic element fluorine (F2) and chlorine (Cl2) are gases , bromine (br2) is a liquid while iodine ( I2) is a solid.