Theoretically, when an ideal gas in a closed container cools, the pressure will drop steadily
until the pressure inside is essentially that of a vacuum. At what temperature should this
occur?

iron and sleel

make siroeel

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.