Group 1a elements (except for hydrogen) are known as the alkali metals.
a. true
b. false

The answer is true that Group 1A elements (except for hydrogen) are the alkali metals. Groups 2A are alkaline earth metals. Group 3B-12B are transition metals. Group 3A to 4A except Boron, Carbon, Nitrogen, oxygen, silicon, phosphorus, sulfur, germanium, astatine, selenium, antimony, tellurium, polonium are basic metal. Carbon, nitrogen, oxygen, phosphorus, sulfur and selenium are nonmetals. Boron, silicon, germanium, astatine, antimony, tellurium and polonium are metalloids. Groups 7A are halogens. Groups 8A are noble gases. The lower part of the periodic table are lanthanides and actinides.

They can measure  the amount of energy gained or lost