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1994年度化学奖授予为研究臭氧做出贡献的化学家.O 3 能吸收有害紫外线,保护人类赖以生存的空间.O 3 的分子结构如图,呈V型,两个O-O键的夹角为116 . 5°.三个原子以一个O原子为中心,另外两个O原子分别构成一个共价键;中间O原子提供2个电子,旁边两个O原子各提供一个电子,构成一个特殊的化学键-三个O原子均等地享有这个电子.请回答: (1) 臭氧与氧气的关系是________. (2) 写出下列分子与O 3 分子的结构最相似的是 [ ] A. H 2 O B. CO 2 C. SO 2 D. BeCl 2 (3) 分子中某原子有一对或几对没有跟其他原子共用的价电子叫孤对电子,那么O 3 分子有________对孤对电子. (4) O 3 分子是否为极性分子________.(填是或否) (5) O 3 具有强氧化性,它能氧化PbS为PbSO 4 而O 2 不能,试配平:________PbS+________O 3 =________PbSO 4 +________O 2 .
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the amount of time spent on formal education was limited
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