Which statement is true about oxygen? a. oxygen is a halogen. b. oxygen is in period 2 and group 16. c. oxygen is a noble gas. d. oxygen is in period 16 and group 4.

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

Ineed to find the answer of this question because i dont understand it

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space