The mineral bauxite, which is mostly Al2O3, is the principal industrial source of aluminum metal. How much aluminum can be produced from 4.00 ton of Al2O3

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

In general metals get as you move from left to right across the periodic table.

In an exothermic reaction at equilibrium, what is the effect of lowering the temperature? a. the reaction makes more products. b. the reaction makes more reactants. c. the reaction is unchanged.