下列化学用语正确的是        A.锂离子的结构示意图:      

下列化学用语正确的是

       A.锂离子的结构示意图:       B.碳原子的轨道表示式:

       C.丁烷的最简式:C2H5                 D.氯化镁的电子式:Mg2+[Cl]2—

答案

C

相关题目

如图为植物组织培养时,所测得的细胞中DNA含量在整个细胞
如图为植物组织培养时,所测得的细胞中DNA含量在整个细胞群中的分布情况。下列说法错误的是   A.①中部分细胞的核糖体增多   B.③中细胞染色体
---Where did you meet him?    ---It was in the hotel _________ I was staying.
---Where did you meet him?    ---It was in the hotel _________ I was staying.    A. that            B. how             C. where            D. which
 I would like a job which pays more, but ____ I enjoy the work I'm doing at pr
 I would like a job which pays more, but ____ I enjoy the work I'm doing at present. A.in other words       B. on the other hand       C. for one thing    D. as a matter of fact
设角的值等于(    )    A.            B.-    
设角的值等于(    )    A.            B.-        C.            D.-
甲、乙是周期表中同一周期的两种元素,其中甲位于第ⅡA族
甲、乙是周期表中同一周期的两种元素,其中甲位于第ⅡA族,原子序数为x,乙位于第ⅢA族,原子序数为y,则x、y的关系不可能为            ( 
Even a small reduction in salt in the diet can be a big help to the heart. A new
Even a small reduction in salt in the diet can be a big help to the heart. A new study used a computer model to predict(预测) how just three grams less a day would affect heart disease in the United
已知是定义在上的奇函数,且,若、,,有; (1)判断函数
已知是定义在上的奇函数,且,若、,,有; (1)判断函数在上的单调性,并证明你的结论; (2)若≤对所有的、恒成立,求实数的取值范围。
小球由地面竖直上抛,上升的最大高度为H,设所受阻力大小
小球由地面竖直上抛,上升的最大高度为H,设所受阻力大小恒定,地面为零势能面。在上升至离地高度h处,小球的动能是势能的两倍,在下落至离地高

最新题目