user-avatar
ctvloga165
2 năm trước
Bài 10. Cho các nguyên tố X, Y, Z. Tổng số hạt p, n và e trong các nguyên tử lần lượt là 16, 58 và 78. Số notron trong hạt nhân và số hiệu nguyên tử của mỗi nguyên tố khác nhau không quá 1 đơn vị. Hãy xác định các nguyên tố và viết ký hiệu của các nguyên tố.
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

1. Tom made a number of suggestions, most of ____ were very helpful. A. them B. which C. that D. whom 2. The teacher explained the lesson twice _____ the students understood it clearly. A. as long as B. so that C. because D. as if 3. Both Mary and Ellen as well as Jean _____ on the tour now. A. are going B. is going C. has been going D. was going 4. I don’t know whether ______ for the job or not. A. to applying B. apply C. to apply D. applied 5. ______ extremely bad weather in the mountains, we’re no longer considering our skiing trip. A. Due to B. Because C. Since D. Thanks to 6. You must leave at once, you ______ miss the train.A. however B. yet C. still D. otherwise 7. _______ of English learners have real chance to use it every day. A. A few B. Few C. A little D. Not much 8. _______ becoming extinct is of great concern to zoologists. A. That giant pandas are B. Giant pandas are C. Are giant pandas D. Giant panda is 9. I’ve applied for the job ________ in the newspaper last month. A. advertised B. advertising C. be advertised D. being advertised 10. ________ to Jim myself, I can’t tell why he would do such terrible things. A. Not to be speaking B. Not to have spoken C. Because of not being spoken D. Not having spoken 11. ........could only have been made by someone incompetent. A.How serious a mistakeB.Such serious mistake C. So serious is this mistakeD. So serious a mistake 12. She insisted that the report ........ as his source of information. A. not be mentioned B. not to mention C. not mentioning D. not mention 13. …... traveling is educational, it can also be stressful and expensive. A. Since B. Providing C. While D. Even 14. They arrived home only to find their house........in their absence. A. was burgled B. has burgled C. had been burgled D. was burgling 15. There isn't a.........of truth in his words. What a liar!A. wealth B. trace C. pack D. grain 16. Don't count your........ before they hatch.A. ducklings B. chickens C. puppies D. birds 17. Manh: Should I buy a new bike or a used one? ~ Dung: Buy ......you can afford. A. the one whichever B. which one that C. those that D. whichever one 18. Dung: “Merry Christmas!” ~ Manh: ".......... ." A. You, too B. Merry Christmas C. You are welcome D. You bet 19. I hope everything is OK. They ........several hours ago. A. would have called B. supposed to call C. must have called D. were to have called 20. He was a great athlete when he was younger. He now still ........if he hadn't had that accident. A. would have been B. had been C. will be D. would be 21. After a month-long investigation, the police still aren't sure who …..... A. is blamed by them B. do they blame C. to lay the blame on D. to be blaming 22. The food wasn't bad, but I'd.........to go somewhere else next time. A. rather B. prefer C. better D. liked 23. The company is famous for making sturdy work clothes that can......hard wear. A. stard up for B. stand up to C. stand in for D. stand up against 24. Employees are advised to take......of the changes in the company policy. A. hold B. effect C. root D. notice 25. The day their first child was bom, the new parents were…......with joy. A. overpowered B. overtaken C. overcome D. overthrown

I. Rearrange the words and phrases given to make meaning full sentences: 1.in/ Linh/ ocean fish./ is/ interested/ ……………………………………………………………………….. 2. many sports./ not/ I’m/ at/ good/ ……………………………………………………………………….. 3. like/ you/ best?/ Which/ will/ room/ ……………………………………………………………………….. 4. tomorrow./ We/ going/ are/ on/ picnic/ a/ ……………………………………………………………………….. 5. environment./ save/ They/ to/ want/ the/ ……………………………………………………………………….. II. Complete the second sentence so that it means the same as the sentence before: 1. They intend to make this beach a clean and beautiful place again. They plan…………………………………………………………………….. 2. The students started to collect old clothes for their charity programme last week. The students have...………………………………………………………….. 3. If I don't leave now, I'll miss my train. Unless I leave ………………………………………………………………….. 4. Students at our school do a lot of outdoor activities. Students at our school take……………………………………………………… 5. Phuc is the most intelligent student in the class. No student ……………………………………………………………………… III. Make sentences using the words and phrases given : 1. What/ time/ you/ go/ gym/ yesterday? =>………………………………………………………………………………….. 2. My/ brother/ favourite/ sport/ volleyball. =>…………………………………………………………………………………... 3. you/ play/ blind man's bluff/ when/ you/ young? =>…………………………………………………………………………………… 4. I/ more/ interested/ in/ football/ than/ table tennis. => ………………………………………………………………………………….. 5. Our team/ win/ match/ last Saturday. =>…………………………………………………………………………………..

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