The metalloids that are included in group 15 are antimony
and

Which substances have the lowest melting points: ionic covalent, or metallic

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

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