Where are the reactants as part of a chemical reaction

Review the branily terms and services guides well u know what i never did so go have a nice ice cream sunday

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

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