The element oxygen, represented by the symbol O, is classified as

Explanation:

Oxygen is the chemical element with the symbol O and atomic number 8. It is a member of the chalcogen group in the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds.

b.transmitters send radio waves, and receivers capture radio waves.

less than one you can't create energy