问题 填空题

.(14分)下表是元素周期表的一部分。表中所列的字母分别代表一种化学元素。

A  
B   CDEF 
GHIJ KL 
     M  N         
试回答下列问题:

(1)请写出元素N的基态原子电子排布式________________________________。

(2)元素B、G形成的单质熔点更高的是______________(填化学式),原因是____________________

(3)ME2L2常温下为深红色液体,能与CCl4、CS2等互溶,据此可判断ME2L2是__________(填“极性”或“非极性”)分子。

(4)在①苯、②CH3OH、③HCHO、④CS2、⑤CCl4五种有机溶剂中,碳原子采取sp2杂化的分子有___________(填序号),CS2分子的空间构型是__________。

(5)元素N可以形成分子式为Co(NH3)5BrSO4,配位数均为6的两种配合物,若往其中一种配合物的溶液中加入BaCl2溶液时,无明显现象,若加入AgNO3溶液时,产生淡黄色沉淀,则该配合物的化学式为_____________________。

答案

(14分)

(1)1s22s22p63s23p63d74s2或[Ar]3d74s2

(2)Li;Li和Na的价电子数相同,但Li原子半径小于Na原子半径,所以Li金属键更强,熔点更高

(3)非极性

(4)①③;       直线型

(5)[Co(NH3)5SO4]Br

阅读理解

阅读理解。

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选择题