n=3→có 3 lớp e
l=2→xét lớp p
Lớp p có 3 obitan
ml=1→xét lớp obitan ngoài cùng
ms=-1/2→spin đi xuống
→Lớp ngoài cùng là `3p^6`
Cấu hình e: `1s^2 2s^2 2p^6 3s^2 3p^6`
→Có 18e→Argon
Không vì cấu hình $3d^9$ $4s^2$ chuyển thành $3d^{10}$ $4s^1$
mong mọi nguoi giúp Exercise 6: Choose the correct words in the following sentences. 1. He doesn’t have (many/ much) money. 2. I would like (a few/ a little) salt on my vegetables. 3. She bought (many/ much) cards last night. 4. There are (less/ fewer) boys in this class than in the next class. 5. There is (too many/ too much) information to learn. 6. Would you like (less/ fewer) coffee than this? 7. This jacket costs (too much/ too many). 8. I don’t want (some/ any) eggs but I want (any/ some) cheese. 9. Is there (some/ any) water in the glass? 10. (How much/ How many) pounds of butter does she want? 11. (How much/ How many) butter does she want? 12. Is there (some/ any) tea in the cup? 13. Peter doesn’t want (something/ anything) to do. 14. I can speak (a few/ a little) English. 15. They don’t need (some/ any) coffee. 16. I can’t buy that house because I have (few/ little) money. 17. I can drink (a few/ a little) wine. 18. Give me (a few/ a little) examples. 19. Every seat in the theater last night (was/were) taken. 20. There are (less/fewer) boys than girls in this class. 21. I don't want (some/any) eggs but I want (some/any) cheese. 22. This jacket costs too (much/many). 23. There (are too many/is too much) traffic on the street at rush hours. 24. He bought (much/many) furniture for her new apartment which she has bought recently. 25. Did you take (any/some) photographs when you were on holiday?
Đốt cháy hoàn toàn 4,6 gam kim loại A cần dùng 2,24 lít khí Clo (đktc) . A, Viết pthh B, Tìm kim loại A.
Tính x,y hình 4 nhé mik cần gấp
hhhhhhheeeeeeeellllppppppppppppppp
Tìm một câu tục ngữ thể hiện đạo lí tốt đẹp của ông cha ta . Mình cần gấp ạ !!!
Mn ơi giúp mik vs ạ mik đg cần ạ
15 m/s = ............... km/h. b. 10 m/s = .............. km/h. c. 43,2 km/h = ............... m/s. d. 600 cm/s = ............m/s = ..............km/h. e. 72 km/h = .......m/s = .........cm/s. f. 30 m/phút = .........m/s = ............cm/s. g. 450 m/phút = .......m/s. h. 90 km/h = ...............m/phút .
Giúp tớ giải bài tập này được không?
giúp nhanh vứi !!! ai nhanh nhất sẽ đc ctlhn nha
bằng phương pháp hóa học hãy nhanạ biết 4 lọ hóa chất mất nhãn sau: HCl, H2SO4, HNO3, NaOH
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