Nguyên tử của nguyên tố X có tổng số hạt là 36. Số hạt mang điện gấp đôi số hạt không mang điện. Tổng số hạt trong hạt nhân là bao nhiêu?

Các câu hỏi liên quan

ai làm được tất cả mình vote cho hơn 10 lần 1. Make sentence with (to) have, and then answer. 1. The girl/ short hair? X Does the girl have short hair ? No, she doesn’t 2. Harry Porter/ big eyes ? X _______________________________________________________________________ 3. The dog /long tail? V _______________________________________________________________________ 4. You / round face? V _______________________________________________________________________ 2. Put one of these words in each blank. play do have plays does has 1. We often ________________ hide – and – seek at break time. 2. Binh _______________ judo everyday so he is healthy. 3. My father ________________ breakfast at 6.30. 4. Nam often ________________ football with his friend after finishing class. 5. My sister and I ________________ her homework in the evening. 6. I _________________ English and Maths today. 7. Thao usually ___________________ the guitar in her free time. 8. Does Mrs Lam __________________ lunch with her friends? 9. They are healthy. They _______________ morning exercises in the morning. 10. My father often ___________________ the gardening at weekend 3. Make questions for the underlined words 1. He goes to school at six thirty. _______________________________________________________________________ 2. Mr. Nam is a teacher. _______________________________________________________________________ 3. Mr. Quang lives in Ha Noi. _______________________________________________________________________ 4. We live on Le Duan street. ____________________________________________________ 5. Every afternoon I play games. _______________________________________________________________________ 6. It’s ten past eleven.___________________________________________________________ 7. These are pencils. _____________________________________________________________ 8. She has breakfast at eleven thirty. _______________________________________________________________________ 4. Chia đông từ ở thì hiện tại đơn 1. Every evening, Nga________________ her homework. (do) 2. There_____________ a hospital, a factory and a stadium near my house. (be) 3. My school____________ four floors. (have). 4. We _____________________ English now.( study) 5. Kien often_______ his bike to visit his hometown.( ride) 6. Every evening, Nga________________ her homework. (do) 7. There_____________ a hospital, a factory and a stadium near my house. (be) 8. My school____________ four floors. (have). 9. She ______________________ English now.( study) 10. Kien often________________ his bike to visit his hometown.( ride) 11. Now, Lan (study)________________English and Lien (listen)______________to music. 12. Every night , she (have)____________________dinner at 7.00 p.m. 13. Every year, I usually (go)______________________Vietnam. 14. In the summer, I sometimes (go)____________________swimming. 15. Every evening, my mother (like)___________ watching television. 16. Lan (have)_______________breakfast and (go)___________to school at 6.30 a.m. 17. We (not read)___________________after lunch. 18. Tom (be)___________my friend. He (play)______________sports everyday. 19. ______________your students (play)__________soccer every afternoon? 20. He (go)_____________to bed at 11.30 p.m. 21. They (go)___________home and (have)___________lunch. 22. ___________he (play)__________sports? 23. He (teach)_______________English in a big school in town. 24. Everyday she (go)____________to work by bike. 25. We usually (read)_________books, (listen)_________to music or (watch)_______TV. 26. Sometimes, I (play)__________badminton. 27. Ann (like)____________her job very much. 28. ___________your mother (walk)_________to the market? 29. Look! They (run)_________________________together. 30. Where ___________________Mr. Ha (live)_______________? 5. Read the text and choose the words to fill in the blanks. beautiful has and have near hotel are student live Hello. My name’s Thuy. I’m a (1)_____________. I have a brother, Minh. He’s twenty. We (2)______________ in a house near a lake. Our house (3)_________________ a yard. It’s (4)_________________ here. There is a river (5)_______________ a lake. There is a hotel (6)________________ the lake. There is a park near the (7)_____________. There (8)____________ trees and flowers in the park. There is a rice paddy near our house. 1. 2. 3. 4. 5. 6. 7. 8.