A biologist plans to spend a year investigating the mating behavior of a certain species of frog. to make meaningful observations, the biologist should observe a) a small number of frogs in their natural habitat
b) A large number of frogs in their natural habitat
c) several groups of frogs maintained in different temperatures in the laboratory
d) several groups of frogs maintained on different diets in the laboratory

the maximum mass of nh3 is nh3 in grams

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.