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Hóa trị của một nguyên tố là ………………………………………………………………. Ta có: a b AxBy ax = by (Biết giá trị 3 đại lượng ta tính được đại lượng thứ 4) Quy ước: hóa trị của nguyên tố H (chọn làm 1 đơn vị), hóa trị của nguyên tố O (chọn làm 2 đơn vị) a. HÓA TRỊ CÁC NGUYÊN TỐ KIM LOẠI THƯỜNG GẶP - Hóa trị I : ......................................... - Hóa trị II: ..................................................................... - Hóa rị III: .................. b. HÓA TRỊ CỦA CÁC ION THƯỜNG GẶP - Hóa trị I: .......................................... - Hóa trị II: …………………………………. II. Phân lọai chất vô cơ 1) Oxit : a) ĐN: Oxit là ……………………………………………………………………………… Vd : ………………………………………………………………. ………………………………………………………………. ………………………………………………………………. b) Phân loại : a) ………………………………………………………………. Vd : ………………………………………………………………. b) ………………………………………………………………. Vd : ………………………………………………………………. c) Cách gọi tên: ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… d) Hóa tính ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… 2) Bazơ : a)ĐN: Bazơ là …………………………………………………………………………………. Vd : ………………………………………………………………. b) Phân loại : + …………………………………………………………………………………. +…………………………………………………………………………………. c) Cách gọi tên: ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… d) Hóa tính ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… 3) Axit : a) ĐN: Axit là ……………………………………………………………………………. b) Phân loại : + ………………………………………………………………. Vd : ………………………………………………………………. + ………………………………………………………………. Vd : ………………………………………………………………. c) Cách gọi tên: ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… d) Hóa tính ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… 4) Muối : a) ĐN: Muối là ………………………………………………………………………………. Vd : ………………………………………………………………. b) Phân loại : + ………………………………………………………………. Vd : ………………………………………………………………. + ………………………………………………………………. Vd : ………………………………………………………………. c) Cách gọi tên: ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… d) Hóa tính ………………………………………………………………………………………………………… …………………………………………………………………………………………………………

giúp em với ạ EXERCISE Exercise 1: Change the following into passive voice. 1. Someone has taken away some of my books. __________________________________________________________________ 2. The children used to play football in the street. __________________________________________________________________ 3. Nobody invited her to the party. _________________________________________________________________ 4. He taught us to use the passive at school. __________________________________________________________________ 5. The boss has considered the workers’ demands. _________________________________________________________________ 6. The villagers gave us a warm welcome. _________________________________________________________________ 7. My mother prepares the meals every day. _________________________________________________________________ 8. They believe that John is the brightest student in the class. __________________________________________________________________ 9. We will send you the papers immediately. __________________________________________________________________ 10. The teacher usually corrects our papers at home. __________________________________________________________________ 11. My father is going to give me a new bicycle. __________________________________________________________________ 12. They spend a lot of money on advertising every year. __________________________________________________________________ 13. The old man told interesting stories to the children. __________________________________________________________________ 14. John used to pay a visit to his grandparents every week. _________________________________________________________________ 15. The boys are playing football in the yard. __________________________________________________________________ 16. People say that employment is the most important thing to the youth today __________________________________________________________________ 17. A policeman is showing her the way to the station. __________________________________________________________ 18. The fire has destroyed almost all houses in the neighborhood. __________________________________________________________________ 19. They considered that she was the best singer. __________________________________________________________________ 20. Don’t wipe your dirty fingers on the clean table cloth. _________________________________________________________________