2023九师联盟考题答案

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4.C【命题意图】本题以陌生物质的结构为背景考查元素推断与元素周期律，具体考查最简单氢化物的沸点、第一电离能、化学键等，意在考查考生接受、吸收及整合化学信息的能力。【解析】基态Y原子的电子填充了3个能级，且有3个未成对电子，可推知其电子排布式为1s22s2p3,则Y为N,从原子序数关系及该分析试剂的结构式可知W是H、X是C;Z与其他元素处于不同的能层，结合该分析试剂的结构式，可知Z是S。NH分子间存在氢键，故NH3的沸点高于CH4,A说法正确；HC=CH、C。H。中C与H的原子个数比均为1：1，B说法正确：同一周期从左往右元素的第一电离能呈增大趋势，但氮元素的2p能级为半满状态，其第一电离能高于同周期相邻元素，故第一电离能：N>0,同一主族从上往下元素的第一电离能呈减小趋势，故第一电离能：0>S,则第一电离能：N>S,即Y>Z,C说法错误；阳离子为铵根离子，铵根离H子中存在配位键（用“→”表示）：[H一N→H]”,阴离H子中NH中的N与Cr也是以配位键相结合，D说法正确。

第二节书面表达need to achieve.Second,everyone is supposed to take anOne possible version:active part in the project and do his own duty.Third,it'sTeam Spiritimportant for team members to communicate with each otherTeam spirit is highly appreciated nowadays becauseand share their experience.By making joint efforts,teamhaving strong team spirit can improve productivityandmembers will be able to attain their goal in the end.creativity.I would like to offer some advice on howtoAs the saying goes,"Teamwork makes the dreamdevelop team spirit.work.Let's learn to cooperate with others.With goodFirst,team members should have a common goal theyteam spirit,we can expect to get the desired results.