Can someone please help I don’t now which one to put

Name the element in group 17, period 2. (periodic table)

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?

How big are the bighest ocean waves at mavericks