Which best identifies why the rusting of an iron nail in the presence of water and oxygen is an oxidation-reduction reaction? water is a reactant. electrons are transferred. nonmetals and a metal are involved o energy is released. 1: 35

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.