Which of the following materials should be classified as an element? Concrete
Bronze
Silver
Wood

Find the number of grams of hcl needed to react completely with .50 moles of magnesium.

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided