按核电荷数的增大,氧族元素的下列性质按递增顺序排列的是(    )

按核电荷数的增大,氧族元素的下列性质按递增顺序排列的是(    )

①单质的熔点  ②元素的非金属性  ③氢化物的还原性  ④与H2反应的能力  ⑤+6价氧化物对应水化物的酸性  ⑥阴离子的半径

A.①②③                B.④⑤⑥                    C.③④⑤                     D.①③⑥

答案

解析:氧族元素中随核电荷数的增加,其性质呈规律性变化,单质的熔沸点、原子半径、阴离子半径及阴离子的还原性等均递增,而元素的非金属性、单质氧化性、与H2化合的能力、最高价氧化物对应水化物的酸性及其气态氢化物的稳定性等均递减。

答案:D

相关题目

p{font-size:10.5pt;line-height:150%;margin:0;padding:0;}td{font-size:10.5pt;}(
p{font-size:10.5pt;line-height:150%;margin:0;padding:0;}td{font-size:10.5pt;}(08年唐山市二模) 过椭圆的焦点且垂直于长轴的弦的长度与此焦点到相应准线的距离相等,
Move Earth—it’s no science fiction LONDON—Scientists have found an unusual
Move Earth—it’s no science fiction LONDON—Scientists have found an unusual way to prevent our planet from overheating: move it to a cooler spot. All you have to do is send a few comets(彗星
One man was to meet his wife downtown and spend some time shopping with her. He
One man was to meet his wife downtown and spend some time shopping with her. He waited  16  for 15 minutes. Then he waited impatiently for 15 minutes more. After that, he became  17 . When he saw a
点M(-3,-1)向右平移3个单位后,得到点M′的坐标为(   
点M(-3,-1)向右平移3个单位后,得到点M′的坐标为(     ,    ). 
太平天国时期有这样一张布告:“殷实之家,务要投诚纳贡
太平天国时期有这样一张布告:“殷实之家,务要投诚纳贡,以助军饷;贫寒之民,出力报效,共同剿灭胡奴,同扶真主。”该材料表明 A.太平天国运
促进①②地区农业的发展的正确措施是              
促进①②地区农业的发展的正确措施是                                                                  ( )     
 It is required that the drugto have serious side effectsfrom the market. A.
 It is required that the drugto have serious side effectsfrom the market. A. reported, withdraw                                B. should report, reject C. reportin
已知向量,,若,则实数的值为(    ) A.1           
已知向量,,若,则实数的值为(    ) A.1               B.     C.          D.

最新题目