Câu 2: Cho Al, nguyên tử X thuộc cùng 1 chu kì với Al và đứng cách Al 4 nguyên tố. a) Xác định số hạt p, n, e và điện tích hạt nhân của nguyên tử Al. b) Xác định số hiệu nguyên tử và viết cấu hình electron của nguyên tử X. c) Hãy cho biết X là kim loại, phi kim hay khí hiếm? Vì sao?

Giúp tui với câu c với ạ đề là phân tích ạ đg gấp ạ

Các bn chọn: Đề 1: Calli:Anime~ Tone: Xanh x Tím; Hồng x Xanh Đề 2: Anime mèo Đề 3: TKB hoặc Nhãn vở Cute xíu

Một đoạn mạch gồm có một điện trở R = 200 W, được mắc vào một nguồn điện có hiệu điện thế ở 2 đầu nguồn là 220V,thời gian dòng điện chạy qua mạch là 2 phút 15s. a.Cường độ dòng điện chạy qua điện trở bằng bao nhiêu? b.Tính điện lượng đã dịch chuyển qua điện trở. c.Nhiệt lượng đã tỏa ra trên R là bao nhiêu?

Cho M = {2; 3; 5; số 8; Số 9; } và N {1; 3; 4; Số 7; Số 9; 10}. Tìm M ⋃ N, M ⋂ N, M \ N, N / M Giải giúp em . Cảm ơn ạ

10. She is …………… than her sister. A. much beautiful B. more beautiful C. as beautiful D. beautiful 11.This shirt is suitable …………… your husband. A . with B . to C . for D . in 12 . Some students in my class don ’t enjoy ……………… games . A . to play B . plays C . play D. playing 13 . We’ll meet …………………. the school gate A. in front of B. front C. next D. close 14 . My father writes for a newspaper . He is a ……………….. . A . driver B. architect C. journalist D. teacher 15 . Mr . Nam grows vegetables and ……………cattles. A . feed B . raises C. rises D. misses 16 . Her birthday is ………… June nineteenth. A . in B . at C . to D . on 17 . You ……………. tired after your long walk . A . is B. should be C. must be D . will are 18 . May is the …………… month of the year. A . fifth B . five C . fiveth D. fiftyth 19 . What ……… delicious meal ! A.an B. a C. some D. any 20. It is an awful restaurant. It is the ……….. restaurant in the town. A. badder B. worse C. baddest D. worst 21 . There ………. a sink , a tub and a shower in the bathroom. A . is B. are C. have D .has 22. She lives ………. The next farm. A . in B . on C. from D. to 23. …………. take care of sick people . A. Journalists B. Teachers C. Farmers D. Doctors 24. People usually cook food in the ………….. A . bathroom B . living room C . kitchen D. bedroom 25 . ………. do you usually do after school ? I read books and watch TV A. When B. What C. How D. Why IV .CAUTION SIGNS :

Mình cần gấp lắm ạ , giúp mình với

Cho hình vẽ bên: Biết AB//EF//DC, ED=1/3 AD, CF=1/3 BC. AB=8 cm, EF=16 cm.Tính x.

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I. Choose the best answer: 1. We all decided__________ our holiday on a Greek island last year. a. to spend b. spend c. spending d. spent 2. I enjoy ___________ on the beach in the summer. a. lying b. to lie c. lie d. lay 3. I gave up ___________ at the post office last week. a. work b. working c. to work d. all are correct 4. Feeling asleep, the driver stopped __________ a cup of coffee. a. to have b. have c. having d. had 5. Remember _________ the doors before going out. a. close b. closing c. to close d. b and c are correct 6. We regret __________ you that we are unable to help you. a. to tell b. tell c. telling d. told 7. The doctor advised her __________ weight because she was too fat. a. lose b. lost c. to lose d. losing 8. You’d better __________ up early in the morning to jog. a. get b. to get c. got d. getting 9. Mary tried __________ the table, but it was too heavy. a. to move b. moving c. move d. moved 10. My brother used to __________ basketball, but now he plays volleyball. a. playing b. to play c. played d. play 11. You’ll get used to __________ in the city. a. lived b. to live c. living d. live 12. Can you tell me how __________ the station. a. to get b. getting c. get d. got 13. Would you mind __________ those windows ? a. open b. openning c. to open d. opening 14. My father usually helps us__________ difficult exercises. a. to do b do c. doing d. a and b are correct 15. Look! We aren’t allowed __________ here. The car needs __________ on the right position a. to park/ to park b. to park/ parking c. parking/ to park d. parking/ parking 16. The orator stopped __________ . He felt thirsty so he stopped __________ a drink. a. talking/ having b. to talk/ to have c. talking/ to have d. to talk/ talking 17. I need __________ what is in the letter. Why don’t you let me __________ it? a. to know/ reading b. knowing/ read c. to know/ read d. knowing/ to read 18. I regret not __________ your advice, so I lost my job. a. to take b. take c. taking d. taken 19. Thank you for __________ me to come and see you next month. I’m excited about __________ you again. a. invite/ see b. inviting/ seeing c. to invite/ to see d. to invite/ see 20. We found it very difficult__________ with Anna. She keeps forgetting __________on important message. a. work/ passing b. to work/ to pass c. to work/ passing d. working/ to pass II. Supply the correct form of the verb in brackets: 1. She had to ask the boy (stop) ____________ (make) ____________ noise. 2. I love (eat) ____________oranges, but I dislike (peel) ____________ them. 3. My mother used to (show) _____________ me where (go) __________ and what (buy) ____________. 4. You don’t need (ask) ____________ those questions. 5. It’s unusual (meet) ____________a shy girl nowadays. 6. It’s no good (talk) ____________ to him. 7. He admitted (steal) ____________ the book. 8. He thought of (give) ____________ up (smoke) ____________. 9. We must avoid (hurt) ____________other people’s feelings. 10. She wishes (be) ____________ alone. 11. We all decided (spend )__________ our holiday (visit)______________a Greek island last year. 12. I enjoy (go) ___________ to the beach in the summer. 13. I gave up (work)___________ at the post office last week. 14. The doctor made her (lose)__________ weight because she was too fat.