Which components of an atom are arranged in various energy levels or orbitals? O electrons O protons O neutrons O electrons and protons protons and neutrons QUESTION 20 Which statement is NOT true? Electrons closest to the nucleus are at the lowest energy level. No more than two electrons can occupy a single orbital. Electrons are unable to move out of the assigned orbital space. The innermost orbital holds two electrons. At the second energy level there are four possible orbitals with a total of eight electrons. QUESTION 27 Sterols are O lipids. O sometimes hormones. O components of membranes. Otroublesome on walls of arteries. O all of these QUESTION 28 Selecting the Exception Four of the five answers listed below are related by a common chemical similarity. Select the exception. cellulose hydrochloric acid O amino acid protein nucleic acid

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