Which half reation equation represents the reduction of an iron(ii) ion? fe+2-> fe+3 + e- fe+2 +2e- -> fe fe+3 +e- -> fe+2 fe-> fe+2 +2e-

Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.

Why does earth rotate? because earth is formed from cold gases collapsing due to gravity because the matter in the nebula that formed earth was spinning because earth forms more than 99% of the mass of the solar system because the hydrogen atoms inside the nebula fused to form helium