When an atom of iron loses all of its 4s electrons and one of its 3d electrons, what is its charge? a. 52 b. 7+ c. 3+ d. 5+

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