Which elements are the labels 1 and 3 most likely to represent? A. Nitrogen and phosphorus
B. Oxygen and hydrogen
C. Oxygen and sulfur
D. Hydrogen and helium

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.

All motion is caused by force? true or false

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.