What properties of metals are explained by its mobile electrons? strength malleability ductility heat conduction current conduction luster opacity

When an object falls through the air and encounters air resistance its overall speed will be than if it had not encountered air resistance? (one word answer)

Voltaic cells produce a positive overall charge. what does this indicate? a. the reaction is likely to be endothermic. b. the reaction is spontaneous. c. the reaction is not likely to occur. d. the reaction is not spontaneous.

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit