I don't know how to find the answer to this question. Can someone please explain how I would find it by looking at a periodic table or something ?Please will give brainliest

If the mass of the products measured 120g what would the mass of the reactants a. 30g b. 60g c. 120g d. 240g

Draw metallic bonding if two copper

Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.