第三节One possible versionParagraph 1And not tery long after that, he made a surprisingdecision. He decided to use all his rights, preparing for hislife at the remote island. In the first year he sent troopsveterinarians and animal trainers to kill the wild animals ortrain them for good use. The task was so huge but it wasworthwhile. Then the king sent a lot of farmers to start awide rice field and began to grow rice. Next he had manyfacilities, from hospital to school, built. After that he senta lot of educated people there. At last he sent all his fami-lies to the islandParagraph 2Finally the time came when the king had to be thrownatay to the island. With many strong soldiers catchinghimsmiled. He had prepared everything for thefinalWhen he was sent lo the island, the island had takenon a new look. Everybody there lived a comfortable life andthe king was welcomed warmly by his people. THcheered, "Long live the wise king. "The wise king livedhappily ever after. The clever people live now in the worldto prepare for their life in the future

5.(16分)(1)自旋(1分)(2)1s2s2p°3s23p53d04s24p3(或[Ar]3404s24p3)(1分)Br、Kr(2分)(3)sp3(1分)(4)①2H3AsO3+3H2S=As2S+6H2O2分)②平面三角形(1分)③<(1分)HAsO可表示为(io)3As,非羟基氧的个数为0,HNO2可表示为(HO)NO,非羟基氧的个数为1,非羟基氧的个数越多,中心原子的正电性越高,导致羟基氧中氧的电子向中心原子偏移越易电离出氢离子,故HNO2的酸性强于H3AsO3(2分)(5)① LiFeAs(1分)②(米,2)(2分)138×4NA×(0.53×10》(2分【解析】(1)量子力学把电子在原子核外的一种空间运动状态称为一个原子轨道,电子除空间运动状态外小有一种运动状态称为自旋2基态As原子的核外电子排布式为s22p53s23p53d4s24p3或[Ar]3d4s24p3;同周期元紊从左向右第一电离能呈增大趋势,但As原子最外层3p能级为半充满的稳定状态,其第一电离能大于Se,故第一电离能大于As元素的是Br和Kr。(3)根据雄黄的结构图可知,As原子形成3个a键,有1对孤电子对因此As的杂化轨道类型为sp(4)①雌黄的分子式为As2S3,则反应Ⅲ的化学方程式为2H3AsO3+3H2S=As2S3+6H2O。②SO2心原子S形成2个a键,孤电子对数为(6-2×2)=1,价层电子对数为3,因此SO2的VSEPR模型为平面三角形。③H3AsO为三元弱酸,不含非羟基氧,HNO2中含有1个非羟基氧,非羟基氧越多,中心原子的正电性越高,导致羟基中氧的电子向中心原子偏移,越容易电离出氢离子,故HNO2的酸性强于H3AsO3。5)①根据晶胞的结构,Li位于晶胞内部,有4个,Fe位于顶点棱心、面心,个数为8x1+8×4+2=4,As位于晶胞内部有4个因此晶体的化学式2为 LiFeAs②根据1号和2号原子的坐标推出3号原子的坐标为(,,2)。个晶胞的质量为38×4g,晶胞的体积为(0.53×10-7)3cm2,则晶胞的密度为138×4NAX(0.53×10-7)8·cm-3

以上就是九年级英语周报第十五期答案，更多英语周报答案请关注本网站。

本文地址： http://www.ncneedu.cn/post/2168.html

文章来源：admin

版权声明：除非特别标注，否则均为本站原创文章，转载时请以链接形式注明文章出处。