A、B、C均为短周期元素，A、B同周期，A、C的最低价阴离子分别为A2－、C－，A2－离子半径大于C－，B2＋与C－具有相同的电子层结构。下列叙述中一定不正确的是 （ ）
A．它们的原子序数A＞B＞C
B．它们的离子半径A2－＞C－＞B2+
C．它们的原子半径C＞B＞A
D．它们的最外层电子数C＞A＞B
相关试题
One of the most important questions they had to consider was _____ of public health. 
| A．what | B．this |
C．that | D．which |
Encourage your children to try new things, but try not to ___ them too hard.
| A．draw | B．strike | C．rush | D．push |
The computer was used in teaching. As a result, not only__________, but students became more interested in the lessons. 
| A．saved was teachers’ energy | B．was teachers’ energy saved |
C．teachers’ energy was saved | D．was saved teachers’ energy |
The children all turned ____ the famous actress as she entered the classroom. 
| A．looked at | B．to look at |
C．to looking at | D．look at |
粤公网安备 44130202000953号