Given that oxygen-16 and oxygen-18 both have an atomic number of 8, how many electrons, protons, and neutrons do these oxygen atoms contain? a) these oxygen configurations contain the same number of subatomic particles - 8 electrons, 6 protons and 10 neutrons. b) any oxygen atom contains 8 electrons and 9 neutrons but these vary in the number of protons - 8 and 10 respectively. c) the oxygen allotropes contain 8 electrons but each contains a different number of neutrons and protons - 8 and 10 respectively. d) both oxygen isotopes contain 8 electrons and 8 protons but each contains a different number of neutrons - 8 and 10 respectively. copper has been used in electrical wiring for two hundred years. identify which molecular level property does not contribute to copper's usefulness a material for wiring. a) high ductility b) high malleability c) high conductivity d) high crystallinity describe how light is emitted from an atom. a) as protons absorb energy they travel from the nucleus through the atom emitting light along the way. b) the light is emitted when energy from sunlight is absorbed by the atom to excite a neutron into a higher level. c) when the nucleus absorbs sunlight, photons are energized and move to a higher energy level and are then released. d) light is emitted from an atom as an electron falls from an excited state to the ground state releasing a photon. during chemistry, dan mixes two clear, colorless solution and mixing them produces a yellow precipitate in a clear, colorless final solution as shown by the chemical equation. pb(no3)2(aq) + 2ki(aq) → pbi2(s) + 2kno3(aq) what physical evidence indicates that there has been a chemical reaction? a) the solution changes color. b) precipitate formation occurs. c) the beaker changes temperature. d) gas bubbles form during the reaction.