题目

核电荷数为11～17的元素，随核电荷数的递增而逐渐变小的是( ) A．电子层数                B．最外层电子数 C．原子半径                            D．元素最高化合价 答案：解析：根据元素周期律和原子核外电子排布规律的知识可知，核电荷数为11～17的元素，电子层数相同，最外层电子数依次增多，最高化合价依次升高，原子半径依次减小。 答案：C把下列句子重新排列组成对话。  1. How about this one?2. I'm going to a party. And I'm looking for a T-shirt.3. Green.4. Can I help you?5. It's great. I like it. How much is it?6. OK. What color do you like? 7. It's 100 yuan.8. I'll take it._______ _______ _______ _______ _______ _______ _______ _______