A biomass pyramid shows the mass that each trophic level are producing overall. e.g., 10 000 kilograms of grass - 1000 cows - 100 kilograms of meat. A pyramid of numbers shows how many animals in numbers are on each trophic level. E.g., 100 kookaburras - 20 snakes - 100 insects. A pyramid of numbers is not necessarily triangular in shape all the time.
Without a charge, it would be 35 electrons. Protons have a positive charge and electrons negative. They must balance each other out, otherwise the atom will be charged.
