How could the Urey-Miller experiment be changed to accurately reflect our knowledge of the conditions of Earth's early atmosphere? Add carbohydrate molecules to the water. Add bacteria to the amino acids. Add oxygen to the mix of gases. Add ultraviolet radiation to the electric current.

Which statement about relative potential energy of electrons is correct? a. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 2 s orbital of the second electron shell. b. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 3 p orbital of the third electron shell. c. an electron in the 3 p orbital of the third electron shell has more potential energy than an electron in the 2 p orbital of the second electron shell.