问题
选择题
下列有关元素周期表(律)说法正确的是 [ ]
A．最外层有两个电子的原子一定在IIA 族
B．IA族均为碱金属
C．同一周期核电荷数越大原子半径越大
D．同一主族金属元素核电荷数越大元素金属性越强
答案
答案：D
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下列有关元素周期表(律)说法正确的是 [ ]
A．最外层有两个电子的原子一定在IIA 族
B．IA族均为碱金属
C．同一周期核电荷数越大原子半径越大
D．同一主族金属元素核电荷数越大元素金属性越强
答案：D
| 选择正确的答案补全对话，将其序号填入题前括号里。 | |||
| A: I 1___________ my village. The water is clean. The air 2___________ fresh. B: I like my village, too. The sky is blue. The clouds 3___________ white. I can run on the grass. A: Are there any pandas in the mountains? B: 4___________, there aren't. Are there any fish in the rivers? A: 5___________, there are. You can see many fish.
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