Những phát biểu nào sau đây là đúng?
Hãy suy nghĩ và trả lời câu hỏi trước khi xem đáp án
- Phát biểu 1 sai vì electron ở gần hạt nhân có mức năng lượng thấp nhất.
- Phát biểu 2 sai vì các electron trong cùng một lớp có thể có các mức năng lượng khác nhau tùy thuộc vào orbital (s, p, d, f).
- Phát biểu 3 đúng vì lớp K là lớp gần hạt nhân nhất, do đó có mức năng lượng thấp nhất.
- Phát biểu 4 đúng vì orbital 2s có mức năng lượng cao hơn orbital 1s.
- Phát biểu 5 sai vì electron ở orbital 3p có mức năng lượng cao hơn electron ở orbital 3s. Theo quy tắc Klechkowski, thứ tự mức năng lượng tăng dần là: 1s < 2s < 2p < 3s < 3p < 4s < 3d < 4p < 5s...
Câu hỏi liên quan
Find the word which has a different sound in the part underlined
Trong các biện pháp trọng nông của triều Nguyễn, chính sách nào có hiệu quả hơn cả?
- Dùng thông tin sau cho Câu 39 và Câu 40: Xét phản ứng tổng hợp hạt nhân:
\(_1^2{\rm{D}} + _1^2{\rm{D}} \to _2^3{\rm{He}} + _0^1{\rm{n}}.\)
Biết rằng, khối lượng của các nguyên tử \(_1^2{\rm{D}},_2^3{\rm{He}}\) và khối lượng hạt neutron lần lượt là: \(2,0141{\rm{u}};3,0160{\rm{u}};1,0087{\rm{u}}.\)
Xác định năng lượng toả ra của một phản ứng. (Kết quả tính theo đơn vị MeV và lấy đến hai chữ số sau dấu phẩy thập phân).
Tỉ lệ gia tăng dân số tự nhiên của Hoa Kì có đặc điểm nào?
"Nếu không giải quyết được vấn đề dân tộc giải phóng, không đòi được độc lập lự do cho toàn thể dân tộc thì chẳng những quốc gia dân tộc còn chịu mãi kiếp ngựa trâu mà quyền lợi của bộ phận giai cấp đến vạn năm cũng không đòi lại được."
Nội dung trên được trích trong văn kiện của Hội nghị nào?
Read the following advertisement and mark the letter A, B, C or D on your answer sheet to indicate the option that best fits each of the numbered blanks from 1 to 6.
Living Every Moment Fully: Secrets to Happiness in the Digital Era
Are you seeking balance in your life? The (1)_________ balance between online and offline worlds awaits you!
Our modern (2)_________ create unnecessary daily life stress in our increasingly connected world. Stolen moments (3)_________ your phone during important conversations add up to lost time. We should remind people (4)_________ the value of being present together.
The secret (5)_________ in finding your perfect digital-life harmony through mindful technology use. Start prioritizing real connections today (6)_________ your life into something meaningful.
Contact us now at Digital Wellness Center for your free consultation!
Hiện tượng nào là hệ quả chuyển động tự quay quanh trục của Trái Đất?
Cho các bước sau:
(1) Tiến hành các thí nghiệm theo đúng quy trình và thu thập dữ liệu từ kết quả thí nghiệm.
(2) Báo cáo kết quả thí nghiệm.
(3) Chuẩn bị các thiết bị, dụng cụ, hóa chất, mẫu vật để làm thí nghiệm.
(4) Vệ sinh dụng cụ, phòng thí nghiệm.
Các bước thực hiện khi làm việc trong phòng thí nghiệm là:
Đối tượng nào sau đây được coi là chủ thể sản xuất?
Con hãy lựa chọn đáp án Đúng hoặc Sai
Bài thơ Tự tình được trích từ tập Lưu Hương kí, đúng hay sai?
Mỗi orbital nguyên tử chứa tối đa
Ý nào sau đây là thể hiện vai trò của tín dụng?
Phép tính 38 + 108 có kết quả dưới dạng hệ nhị phân là
Trước khi sử dụng bản đồ, phải nghiên cứu kĩ yếu tố nào?
Các nước có thu nhập ở mức thấp hiện nay hầu hết đều ở khu vực nào?
Cho cấp số nhân \(\left(u_{n}\right)\) thỏa mãn \(2\left(u_{3}+u_{4}+u_{5}\right)=u_{6}+u_{7}+u_{8}\).
Tính \(\frac{u_{8}+u_{9}+u_{10}}{u_{2}+u_{3}+u_{4}}\)
Ý nào sau đây là thể hiện đặc điểm của mô hình sản xuất hộ kinh doanh?
Read the following leaflet and mark the letter A, B, C or D on your answer sheet to indicate the option that bestfits each of the numbered blanks from 7 to 12.
Join Our Student Exchange Program!
Are you eager to explore a new culture, improve your language skills, and make lifelong friends? Our Student Exchange Program is the perfect opportunity for you!
Students from our school will have the chance to study abroad while welcoming (7) ______ students into their homes. This is a great way to experience different educational systems and lifestyles.
During the program, you will (8) ______ new challenges, such as adapting to a new environment and communicating in a foreign language. (9) ______, these experiences will help you grow both academically and personally.
Participants will receive full (10) ______, including accommodation, meals, and tuition fees.
Instead of traveling as a tourist, why not become a local for a semester? This exchange allows you to fully immerse yourself in a new culture.
This program helps students develop essential skills such as independence, adaptability, and (11) ______.
Apply now and take the first step towards an unforgettable experience in international (12) ______!
Read the following passage about food addiction and mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each of the following questions from 31 to 40.
Few people would disagree that one of the world's most popular dishes is pizza. Twenty-two-year-old Zack certainly wouldn't. He would eat a variety of pizza-based items, including homemade pizza, precooked microwave pizza, and even pizza leftovers from the night before. He was consuming 800kg of pizza a year. As a child, Zack had eaten a wide variety of food. But he became addicted to pizza when he started secondary school. American school meals have often been criticised for the large amount of fast food present on the menu, and pizza is the star dish. Zack even spent all his pocket money on slices of pizza.
Naturally, Zack's family worried about his high-calorie, low-vitamin diet. So did Zack. In an attempt to break his addiction, Zack agreed to appear on a TV programme called Freaky Eaters. Its aim was to encourage food addicts to beat their addictions with the help of a psychologist and nutritionist. It wasn't easy. He had to eat a fish dish, while his brother sat in front of him enjoying... a pizza! However, Zack met the challenge and has never eaten pizza again.
Seventeen-year-old Stacy Irvine's friends visit her and discover that she has been rewarded thousands of free toys from fast food restaurants as a regular customer. Stacy's mother often gave her two-year-old girl a portion of fried chicken in a McDonald's restaurant. [I] Since then, Stacy has refused to eat anything else except for pieces of fried chicken, and as a result, her diet has created serious health. She has been warned that if she doesn't change her diet, she will die. [II] Stacy once collapsed due to lack of vitamins and nutrients and needed to be hospitalised. [III] She insisted that Stacy adopt a healthier lifestyle. However, worryingly, Stacy's mother said that while Stacy was beginning to understand the seriousness of her situation, she couldn't eat anything else but chicken nuggets. [IV]
Twenty-year-old Hanna Little was keen on chips. The only thing that Hanna consumed for fifteen years was one plate of chips after another. Not surprisingly, a diet that contained few nutrients and an excess of fat and carbohydrates could only have negative consequences. And it did because not only did Hanna develop health problems, but she also had to leave her job after collapsing at work. At five, Hanna became addicted to chips and refused to eat fruits and vegetables despite her mother's efforts. Hanna says that she was terrified of tasting the flavour of different types of food and she would feel anxious just at the idea of doing it. Parties, picnics and barbecues with friends and family used to be a nightmare. Furthermore, Hanna was soon seen as 'odd' by her friends' parents.
It wasn't until the age of sixteen that Hanna realised she had Selective Eating Disorder (SED). Despite this new knowledge, no solution was found. It wasn't until she lost her job before she started eating normally. Hanna sought therapy from psychologist Felix Economakis, who used hypnosis, a treatment that none of the doctors that she had seen before had mentioned, to get her to eat fruit after one one-hour session, and since then she has been willing to eat anything.... including chips!
(Adapted from Friends Global)
Which of the following can be inferred from the passage?
Chén rượu hương đưa say lại tỉnh
Vầng trăng bóng xế khuyết chưa tròn
Hai câu thơ trên là?