user-avatar
214909979761619
2 năm trước
Câu 1: Viết cấu hình e của nguyên tử của nguyên tố có số thứ tự 15, 17, 20, cho biết nguyên tố đó thuộc chu kì nào, nhóm nào? Câu 2: Nguyên tố Y thuộc chu kì 3, nhóm VA. a) Y có bao nhiêu lớp e? Y có bao nhiêu e hóa trị? Các e hóa trị này thuộc lớp e nào? b) Viết cấu hình e nguyên tử của Y?
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Bài tập 3: Câu WishTương lai: 1. I want to be in the US. I wish I ____________ (visit) the US one day. 2. It is a busy street. I wish it________ (not be) a traffic jam. 3. I want some hamburger. I wish we __________ (go) to McDonald’s tonight. 4. I feel sick. I wish the doctor __________ (come) to my room. 5. Minh’s favorite sport is soccer. He wishes he ____________(play) it next weekend. Bài tập 4: Chọn đáp án đúng 1. He likes to swim. He wishes he … near the sea. A. lives B. lived C. had lived D. would live 2. It’s cold today. I wish it … warmer. A. is B. has been C. were D. had been 3. I wish I … the answer, but I don’t. A. know B. knew C. had known D. would know 4. She wishes she … blue eyes. A. has B. had C. had had D. would have 5. She wishes she … a movie star. A. is B. were C. will be D. would be 6. I have to work on Sunday. I wish I … have to work on Sunday. A. don’t B. didn’t C. won’t D. wouldn’t 7. I wish you … borrow my things without permission. A. don’t B. won’t C. shouldn’t D. wouldn’t 8. He wishes he … buy a new car. A. could B. might C. should D. would 9. She misses him. She wishes he … her a letter. A. has sent B. will send C. would send D. would have sent 10. I wish I … help you. A. can B. could C. will D. would

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team