Which statement is true about an empirical formula?
it is the true ratio of atoms in a formula unit.
it is the simplest ratio of atoms in a formula unit.
it represents the true molecular mass of a chemical formula.
it represents the highest ratio of coefficients in a chemical formula.

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.

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.