Sat March 07, 2015 By: Deebu Raghv

Size of ions increase down the group:
Then why is gropu 16 elements: O
Same happense in group 17 [At is excluded] 
Please explain why.

Expert Reply
Vaibhav Chavan
Mon March 09, 2015

The first four elements of group 16 i.e. Oxygen, sulphur, selenium and tellurium are non-metals.

Polonium is the last member of the group 16 and is metallic in nature.It is also radioactive and is only short-lived.

Same goes with Astatine of group 17.

Related Questions
Home Work Help