Tên gọi của oxit ( sắt hoặc đồng ) là : tên kim loại kèm theo hoá trị + oxit
~~> chọn D
Đáp án:D
Vì cách gọi của những oxit kim loại nhiều hóa trị là
Tên kim loại+Hóa trị+oxit
giúp vs ạ .......................
Vẽ hoa oải hương hoặc hoa hướng dương ( oải hương thì full chủ yếu là tím + xanh lá cây ) ( Hướng dương thì cam + vàng )
4. They __________________ (not watch) television at the moment. IV. Choose a suitable word in the box to complete the passage ( 1 pt ) people is continent which the region Australia is an island (1) ________ in the South Pacific. The capital (2) ________ Canberra, but the city with (3)_______ biggest population is Sydney, which has nearly four million. English is the first language of most (4)_______, but there are also immigrants who speak other languages. V. Read the passage below then answer the questions (2pt) My name is Petty and this is my husband, Phil. We both work in offices in London. We have breakfast at half past seven. We don’t have a big breakfast. We usually have bread, coffee and orange juice. For lunch we usually have a salad or soup and sandwich. That’s at about 1.30. We usually have dinner at half past seven in the evening. It is a big meal of the day and we have meat or fish with vegetables and potatoes or rice. We have orange juice with milk. On Saturday evenings we go to a restaurant for dinner at about eight o’clock. 1. Part 1: Answer the questions (1pt): a. What time do they usually have breakfast ? b. Is dinner a big meal for Petty and her husband ? 2. Part 2: Decide whether the statements are True (T) or False (F).(1pt) c. They have orange juice with milk for lunch. d. On Saturday evenings they eat out for dinner at about eight o’clock. VI Rewrite the second sentences in the way that its meaning stays the same as the first one (1pt) 1. Let’s go to the cinema. -What about __________________________________________________________? 2. Tom is taller than Tony. - Tony ____________________________________
Câu 1. Cho các chất, hỗn hợp chất sau đây: Na2O, Al, H2, Ba(OH)2, CaCO3, O2, nước chanh, nước muối, CO2, muối ăn NaCl, đường kính C12H22O11. Hãy viết các chất, hỗn hợp chất Câu 2. Điền thông tin vào bảng sau: Số hiệu nguyên tử (Z) Ký hiệu hóa học Tên nguyên tố Số e trong từng lớp Số lớp e Số e lớp ngoài cùng Nguyên tố kim loại, phi kim hay khí hiếm 11 12 13 14 15 16 17 18 19 20 21 Sc Scandi 22 Ti Titan 23 V Vanadi 25 Mn Mangan 26 Fe Sắt
Giúp mình với Mai kiểm tra mình rồi
Vẽ Chữ Mynrap đẹp hứa tick 5* và clhn
cần lm gấp ạ cảm ơn mọi người trc ạ
II. Electricity is the most common form of energy today. In the modern world, electricity is very available at the touch of a switch. Electricity has many uses. The most common use of electricity is providing artificial lighting. In factories, electricity is used to light up the work place. It is also used to operate air conditioners, computers and many other machines. Electricity is also used to power the many appliances that we have in our homes such as appliances include television sets, computers, electric fans, irons and many others. The list is simply endless. Modern man will most probably be lost without electricity. 1. Is electricity the most common form of energy today? => __ 2. What is the most common use of electricity? => __ 3. What do people use electricity for at home? => __ 4. How would our life be if there were no electricity? => __
Xét về cấu tạo ngữ pháp câu văn sau thuộc kiểu câu nào? Thỉnh thoảng nghe tiếng quan phụ mẫu gọi: “Điếu, mày”; tiếng tên lính thưa: “Dạ”; tiếng thầy đề hỏi: “Bẩm, bốc”; tiếng quan lớn truyền: “Ừ”. Kẻ này: “Bát sách! Ăn”.
Diễn tả bằng lời các yếu tố của lực trong hình vẽ sau :
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