问题 填空题

(9分)氮及其化合物在生活、生产和科技等方面有重要的应用。请回答下列问题:

(1)氮元素基态原子的价电子排布式为               

(2)在氮气分子中,氮原子之间存放着          个σ键和         个π键;

(3)N2分子中氮氮键的键长             (填“大于”、“小于”或“等于”)

F2分子中氟氟键的键长;

(4)氮元素的氢化物——NH3是一种易液化的气体,该气体易液化的原因

                                          

(5)配合物[Cu(NH3)4]C12中含有4个配位键,若用2个N2H4代替其中2个NH3,得到的配合物[Cu(NH3)2(N2H4)2]C12中含有配位键的个数为             

答案

(1)略                     2分

(2)1;2                    2分

(3)小于                    1分

(4)氨分子之间容易形成氢键,使其沸点升高而容易液化   2分

(5)4   2分

完形填空
完形填空。
Dear Sandy,
     My family and I __1__ in Nanjing, China. We are very happy. I am ___2__ student in No. 11 Middle School. Is
our school ___3___? No, it isn't very big, but it's very beautiful. There __4___ any swimming pools(游泳池) in it.
But our school ___5__ two basketball courts. There is a garden and many tall trees in our school. There are about
fifty __6__ in our school. I am in Class 2, Grade 1. My classroom is ___7___ the second floor in __8___ A. There
are twenty boys and twenty-five boys in my class. Miss Fang is our Chinese teacher. __9__ is a very good teacher.
We all like her very much.
     May(愿) you be   10  ! Hope(希望) to see you soon(尽快).
                                                                                                                                                                        Yours,
                                                                                                                                                                         Lily
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