单选题 适中0.65 引用1 组卷200
某教材中有下面一段话:For many years chemists were unsuccessfully tried to prepare the perbromate ion,。The first successful synthesis of perbromate involved an isoelectronic species as the starting material。The process is described as following:。以下说法正确的是
A.该过程发生了化学变化 | B.Br元素的质量数为83 |
C.中含有68个电子 | D.与互为同位素 |
23-24高一上·上海·期中
类题推荐
氯元素有两种核素Cl、Cl。
(1)关于Cl原子说法正确的是_______ 。
(2)Cl、Cl具有_______ 。
(3)Cl、Cl都属于氯元素,由此可知:_______ 决定元素种类,_______ 决定核素种类。
(4)Cl、Cl互为何种关系_______ ?
(5)写出与Cl-具有相同电子数的正离子、负离子、分子各一种:_______ 、_______ 、_______ 。
(6)Br、Cl都属于卤族元素。某教材中有下面一段话:
For many years chemists were unsuccessfully tried to prepare the perbromateion,BrO。The first successful synthesis of perbromate involved an isoelectronic species as thestarting material。The process is described asfollowing:SeO→BrO+e-。以下说法正确的是_______ 。
(7)已知:氯元素的近似相对原子质量为35.5。STP下,11.2LHCl气体中含H35Cl_______ mol。
(1)关于Cl原子说法正确的是
A.中子数等于质子数 | B.质子数等于电子数 |
C.质子数等于质量数 | D.电子数等于中子数 |
A.相同质量数 | B.不同质子数 | C.相同中子数 | D.相同电子数 |
(4)Cl、Cl互为何种关系
(5)写出与Cl-具有相同电子数的正离子、负离子、分子各一种:
(6)Br、Cl都属于卤族元素。某教材中有下面一段话:
For many years chemists were unsuccessfully tried to prepare the perbromateion,BrO。The first successful synthesis of perbromate involved an isoelectronic species as thestarting material。The process is described asfollowing:SeO→BrO+e-。以下说法正确的是
A.该过程发生了化学变化 | B.Br元素的质量数为83 |
C.SeO中含有68个电子 | D.Se与Br互为同位素 |
组卷网是一个信息分享及获取的平台,不能确保所有知识产权权属清晰,如您发现相关试题侵犯您的合法权益,请联系组卷网