您所在的当前位置：高中化学试题 >

物质的组成

> X、Y两短周期元素，已知X原子的L层上的电子数比Y原子的L层上的电子数少2个，而X原子最外层上电子数比Y原子最外层上的电子数多一倍，则X、Y形成的化合物的化学式可表示为（） A．XY2 B．YX3 C．XY3 D．Y2X3

问题：

发布时间：2024-09-08

X、Y两短周期元素，已知X原子的L层上的电子数比Y原子的L层上的电子数少2个，而X原子最外层上电子数比Y原子最外层上的电子数多一倍，则X、Y形成的化合物的化学式可表示为（）

A．XY₂ B．YX₃ C．XY₃ D．Y₂X₃

参考答案：

提问用户：lP***8us

可能感兴趣的题目：

1 Can you think of some cases ________ people can communicate only by means of body language? A．that B．which C．where D．when
2 雨过天晴的夜晚，为了不踩到地上的积水，下面判断中正确的是( ) A．迎着月光走，地上暗处是水；背着月光走，地上亮处是水 B．迎着月光走，地上亮处是水；背着月光走，地上暗处是水 C．迎着月光走或背着月光走，都应是地上发亮处是水 D．迎着月光走或背着月光走，都应是地上暗处是水
3 函数f（x）=Asin（ωx+φ）（A＞0，ω＞），|φ|＜ π 2 ）的部分图象如图示，则将y=f（x）的图象向右平移 π 6 个单位后，得到的图象解析式为（　　） A．y=sin2x B．y=cos2x C．y=sin（2x+ 2π 3 ） D．y=sin（2x- π 6 ）
4 The popular US drama series “House of Cards”, which has already started its second season, features Chinese elements in its storyline. Traditional heroes are no longer sought after anymore. Today, it’s unconventional leading figure -like Francis J. Underwood from “House of Cards” who are winning audiences’ hearts. The political drama, which airs on the Internet service Netflix, has won the applauses of viewers around the world since its debut(首次亮相) on February 1, 2013. And it has caught the attention of real politicians, including US President Barack Obama. Kevin Spacey plays Francis J. Underwood, a cold-blooded Democrat who moves his way up the political ladder by any means necessary. He often uses his under-exposure in media to carry out misdeeds that will later benefit him. The revenge(报仇) theme plays a heavy role throughout the storyline, Underwood, who had high hopes for an appointment as Secretary of State in the first season, was betrayed by the US President and his former colleagues. He and his wife then conducted a plan of revenge and swore to unseat those who turned their backs against him. Through their plan, Underwood’s own hunger for power grew and empowered him to get rid of whoever stood in his Way. The release of the trailer(预告片) of the second season excited millions of viewers around the world, including US President Barack Obama, who has been a loyal fan since the series debuted. Obama expressed his admiration for Underwood. “This guy’s getting a lot of stuff done,” he said. Although the President is anxious to watch the story unfold, he’d like to do it at his own pace. After the release of the second season on February 14, 2014, Obama sent words on his Twitter account, “Tomorrow: @HouseOfCards. No spoilers , please.” The second season has promised to be darker, with more unexpected turnouts, and is to include more Chinese elements. “Perhaps the team, including myself, has realized that in the next decade, Asia will be an extensively important region, and China will play an active role in its transition and change,” says Spacey. 小题1:The second season is different in that _____. A．it is a political drama B．more Chinese elements are involved C．it has caught the attention of US President Barack Obama D．Kevin Spacey, a cold-blooded Democrat, plays Francis’J. Underwood 小题2:The 3rd and 4th paragraph mainly deal with ______. A．the plot of the drama series B．the background of the drama series C．the characters of the drama series D．the popularity of the drama series 小题3:The author may agree that ______. A．the second season is expected to be darker with more deaths B．audiences lose their heart to traditional heroes in the drama C．the drama is the reflection of politics of America in real life D．the drama has won the recognition of viewers since its first season 小题4:The message sent by Obama on his Twitter account proves that he_______. A．doesn’t wish to be told what to do as a drama fan B．adores the drama so much that he wants to watch it in advance C．doesn’t want to be disturbed while watching the drama D．hopes nobody will inform him of the plot of the drama in advance
5 过抛物线x 2=2py（p＞0）的焦点F作倾角为30°的直线，与抛物线分别交于A、B两点（A在y轴左侧），则（）。
6 探究问题。材料一《复兴之路》，全景式追溯了中国近现代历史，着力于一个影像的中国，理性且深情梳理了中华民族167年的伟大复兴道路……和其他大国的崛起不同，中国是从内忧外患的境地中一步一步争取到独立自主和国家富强的。材料二“20世纪的最后20年，在世界的东方，中国进行了一场卓有成效的社会变革，解放了思想的中国人焕发出蓬勃的创造力，书写了一个时代最为传奇的一页。” ——摘自《复兴之路》（1）同学们认为：中华民族近日年艰苦卓绝的伟大复兴的历史，关键是“中国新生”和“伟大转折”实现了国家的独立和富强。请你说出开启这两个阶段的历史事件。并分别说出它们最伟大的历史意义。 _______________________________________________________________________________ （2）“20世纪的最后20年，中国书写了一个时代最为传奇的一页”，请用这一时期的成就举例说明。（至少两点） _______________________________________________________________________________ （3）今天，中国的发展已经站在一个新的历史起点，你认为中华民族伟大复兴之路将如何继续？ _______________________________________________________________________________
7 如图所示，有一小球质量为m，用轻绳AB和BC连接处于静止状态，AB沿水平方向，BC与竖直方向成角θ．则在剪断AB后的瞬间（球未摆动），绳BC所受拉力与原来受的拉力的比等于（　　） A．cos2θ B．sin2θ C． 1 cos2θ D． 1 sin2θ
8 Can you _____ the capitals of all the countries? A．call B．name C．tell D．give
9 已知且，则下列不等式中成立的是( ) A． B． C． D．
10 We were all sad_ ___ we knew eight policemen lost their lives during the earth quake in Haiti . [ ] A. before B. when C. unless

X、Y两短周期元素，已知X原子的L层上的电子数比Y原子的L层上的电子数少2个，而X原子最外层上电子数比Y原子最外层上的电子数多一倍，则X、Y形成的化合物的化学式可表示为 （ ） A．XY2 B．YX3 C．XY3 D．Y2X3

可能感兴趣的题目：

X、Y两短周期元素，已知X原子的L层上的电子数比Y原子的L层上的电子数少2个，而X原子最外层上电子数比Y原子最外层上的电子数多一倍，则X、Y形成的化合物的化学式可表示为（）

A．XY₂ B．YX₃ C．XY₃ D．Y₂X₃