What air mass is represented by the letters C and T?

Explanation:

Based on temperature: tropical (warm), polar (cold), arctic (extremely cold). Naming convention for air masses: A small letter (c, m) indicates the moist content followed by a capital letter (T, P, A) to represent temperature.

gas

explanation:

smoke is the matter of a gas

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.