What is true of a molecule?
a. all molecules of a compound have one type of atom.
b. each atom of a molecule is the same.
c. each molecule of a compound has different properties.
d. all molecules of a compound have the same properties.

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

How many moles of water are created if 3 moles of hydrogen react completely with excess oxygen?

Suppose you discovered a new element with 120 protons and 2 electrons in its outer level . i'm what group does this new element belong? what properties would you expect it to have