Can you help with these two questions please

This is a mixture that has the same composition throughout.

Using the periodic table, complete the table to describe each atom. type in your answers.a ? b? c? d? e? f?

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