What is the chemical equation of ccl4, explain you! : -d

Which of the following pairs of elements belong to the same groupa. h and he b. li and bec. c and pb d. ga and ge

The appropriate concentration for an iodine sanitizer is

What do electromagnetic waves carry? how are they produced through which media can they move? where do they transfer energy? what do they not transfer? what do mechanical waves carry? how are they produced? through which media can they move? where do they transfer energy? what do they not transfer?