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一.选择 1.下列各原子构成的单质中,能与稀硫酸反应制取氢气的有( )。 A.M电子层和K电子层上电子数相等 B.L电子层上有3个电子 C.原子核内没有中子 D.没有N层,最外层电子数等于其电子层数 2.某化合物由A、B两无素组成,其分子量为76,已知B原子核外有8个电子,而A原子核内比B原子核少1个质子和1个中子,则此化合物的分子式为( )。
I. Selection 1. The following elements in the composition of the atoms can react with dilute sulfuric acid to produce hydrogen (). The number of electrons on the AM and K electron layers is equal to the number of electrons on the BL electron layer. There are no neutrons in the nucleus. D. There is no N layer, and the outermost electrons equal their number of electrons. 2. A certain compound consists of A, B The composition of the two elements, its molecular weight is 76, known to have 8 electrons outside the B nucleus, and the A nuclear nucleus than the B nucleus less 1 proton and 1 neutron, then the formula of this compound is ().