下列各项中表达正确的是（ ）
A．白磷的分子式：P
B．Na+结构示意图是：
C．乙醇的结构简式C2H6O
D．HClO的电子式：
答案：B
（易）考查电子式、原子结构示意图、分子式、结构式和结构简式的表示方法，白磷的分子式为P4；Na+结构示意图正确；乙醇的结构简式为CH3—CH2—OH或CH3CH2OH或C2H5OH。HClO的结构式为HO—Cl，所以其电子式为：
。
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