What are properties or characteristics shared by metalloids and nonmetals?

Nonmetals have properties opposite those of the metals. The nonmetals are brittle, not malleable or ductile, poor conductors of both heat and electricity, and tend to gain electrons in chemical reactions. Some nonmetals are liquids. These elements are shown in the following figure.

Yes, endothermic means it turns cold. and some chemical changes include change of tempature.

True is ur answer : )