Alcohol burning in a flaming dessert endothermic or exothermic

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

Why is permeable soil best for plants that need a lot of drainage?

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