cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium. i hope you have fun reading that
they were native americans.
effect of increasing surface area on the rate of a reaction. increasing the surface area of a solid reactant exposes more of its particles to attack. this results in an increased chance of collisions between reactant particles, so there are more collisions in any given time and the rate of reaction increases.