Nguyên tử X có tổng số hạt cơ bản là 77, trong đó số hạt mang điện nhiều hơn số hạt không mang điện là 19. Cho các phát biểu sau:

(a)   Nguyên tử X có số khối là 53

(b)   Nguyên tử X có 7electron s

(c)   Lớp M của nguyên tử X có 13 electron

(d)   X là nguyên tố s

(e)   X là nguyên tố kim loại

(f)    X có 4 lớp electron

Trong các phát biểu trên, số phát biểu đúng là

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. 

PROMOTE MENTAL WELL-BEING AT HOME!

Nurturing Your Mind and Spirit

Taking care of our mental health is just as important as our physical health, which  helps us cope with stress, build resilience, and lead fulfilling lives.

Facts and Figures

• Nature’s Impact: Studies show that spend time outdoors can significantly reduce stress levels. However, (7)_____ people feel they lack access to green spaces.

• Screen Time Concerns: Excessive daily (8)_____  time is linked to increased anxiety and depression. (9)_____ spending too much time on the phone screen, why don’t we go outside and get some fresh air?

Positive Actions You Can Take

• Designate a cozy corner in your home for reading, meditation, or simply unwinding. Make it a daily habit with soft lighting, plants, and comfortable seating.

• Start a gratitude journal! (10)_____ three things you're thankful for each day to cultivate a positive mindset.

• Make time for meaningful (11)_____ with family and friends. Connect with (12)_____ regularly help strengthens your support network and combats feelings of isolation.

Tìm tất cả các giá trị của m để phương trình sau có nghiệm \(\cos 2x=\frac{m}{2}.\) 

Choose A, B, C or D that has the OPPOSITE meaning to the underlined word/phrase in each question.

AI systems assist doctors in detecting dangerous drug interactions that could put patients in jeopardy.

Hình dưới đây mô tả đồ thị độ dịch chuyển - thời gian của một chiếc xe ô tô chạy trên một đường thẳng. Vận tốc trung bình của xe là

Các bước nào dưới đây là đúng khi nói về tiến trình của phương pháp quan sát?

Đặc điểm nào sau đây không đúng với ngành nội thương?

Một máy bay có vận tốc khi tiếp đất là 100 m/s. Để giảm vận tốc sau khi tiếp đất, máy bay chỉ có thể có gia tốc đạt độ lớn cực đại là 4 m/s². Tính thời gian ngắn nhất để máy bay dừng hẳn kể từ khi tiếp đất? 

Read the following passage 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 23 to 30.

The 22nd Southeast Asian Games were held in Vietnam from December 5th to 13th, 2003. It marked the first time Vietnam hosted such a significant sporting event, yet the Games were a great success. They became a grand festival that impressed sports enthusiasts with their spirit of solidarity, cooperation for peace, and development. The event demonstrated Vietnam's capability to unite the region through sports.

Athletes from 11 participating countries competed in 32 sports, winning a total of 444 gold medals. Teams in table tennis, badminton, karate, volleyball, basketball, and wrestling showcased some of the region’s top competitors. Notably, many records set during the Games were close to international standards. Vietnam emerged victorious, securing 158 gold medals and finishing at the top of the medal standings. Thailand came second with 90 golds, while Indonesia ranked third with 55. Singapore and Vietnam were the only nations with participants honored as the Most Outstanding Athletes in Swimming and Shooting events.

In football, the Vietnamese Women's Football team successfully defended their SEA Games title, a moment of pride for the host nation. In the Men's Football Final, Vietnam faced Thailand but lost, with the Thai team taking home the gold medal. Other sports, such as karate, athletics, bodybuilding, and wushu, saw young and talented Vietnamese athletes delivering exceptional performances and securing numerous gold medals. The strong performance of the athletes reflected Vietnam's growing prowess in the regional sports arena.

Vietnam’s first-place finish was not surprising. To prepare for the 22nd SEA Games, the country implemented an intensive training program for its athletes, involving both domestic and international facilities. Furthermore, the enthusiastic support from the Vietnamese people inspired the athletes to compete in high spirits. This success solidified Vietnam’s reputation as an excellent host for international sporting events. With this achievement, Vietnam has demonstrated its potential to host even larger competitions, such as the Asian Games, in the future.

Which of the following is NOT mentioned as one of the sports that Vietnam won gold medals in?

Ở thực vật, nguyên tố dinh dưỡng khoáng thiết yếu nào là nguyên tố đại lượng?

Sự phát triển của các ngành công nghiệp nào sau đây góp phần quyết định việc Trung Quốc chế tạo thành công tàu vũ trụ?

Dùng một đồng hồ đo thời gian có độ chia nhỏ nhất 0,001 s để đo n lần thời gian rơi tự do của một vật bắt đầu từ điểm A (v_A = 0) đến điểm B, kết quả cho trong bảng dưới đây. Thời gian rơi trung bình, sai số ngẫu nhiên, sai số phép đo thời gian là bao nhiêu? Kết quả đo được ghi như thế nào? Biết sai số dụng cụ là 0,001 s.

Sai số tuyệt đối của phép đo thời gian là

$\Delta t=\overline{\Delta t}+\Delta t_{dc}=$ s.

Kết quả phép đo được ghi như sau:

Một biện pháp giúp hạn chế hậu quả khi truy cập vào đường liên kết lạ là

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence(s) that best complete(s) each of the following exchanges.

Greg: “Kate, Giga Mall is having a big sale this week. You wanna go?”

Kate: “_____________”

Một du khách đi từ địa điểm I đến địa điểm IV và muốn dừng ở hai địa điểm nữa để tham quan. Lộ trình nào sẽ có giá vé thấp nhất cho du khách trong các lộ trình sau?

Thông tin của thị trường mang lại người mua điều gì?

Chi tiết nào là nơi lắp đầu to thanh truyền?

Một loài thực vật, gen B qui định thân cao, trội hoàn toàn so với alen b qui định thân thấp. Cho cây thân cao mang kiểu gen dị hợp tử tự thụ phấn (P). Chọn ngẫu nhiên 5 cây F₁, xác suất để trong đó có 3 cây mang kiểu gen dị hợp là bao nhiêu?

Ưu điểm của kiểu chuồng nuôi hở là gì?

Read the following passage about the Second Acts That Inspire 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.

Life often presents us with unexpected challenges that force us back to the drawing board. Whether due to personal setbacks, career changes, or unforeseen circumstances, the courage to begin again can lead to remarkable transformations. Many inspiring individuals have shown that it's never too late to reinvent oneself and pursue new dreams. Throughout history, countless people have overcome seemingly impossible situations through sheer determination.

[I] Take J.K. Rowling, for instance. Before becoming a literary sensation, she was a struggling single mother living on welfare. [II] Her determination eventually paid off when her books became a global phenomenon, proving that setbacks can become stepping stones to success. [III] This remarkable turnaround demonstrates how resilience and unwavering belief in oneself can overcome seemingly insurmountable obstacles. Despite facing depression and financial hardship, she never gave up on her dreams. [IV]

Colonel Harland Sanders' story is another testament to the power of starting anew. At the age of 65, when most people contemplate retirement, he found himself struggling financially after his restaurant failed. Instead of giving up, he traveled across America, sleeping in his car while pitching his chicken recipe to restaurant owners. His recipe for success wasn't just about the perfect blend of herbs and spices; it was about persistence and determination. After facing over 1,000 rejections, he finally established Kentucky Fried Chicken, which grew into a global empire. His unwavering spirit and dedication inspired generations of entrepreneurs worldwide.

These inspiring stories remind us that failure is not final, but rather a chance to redirect our path. Every setback carries the seed of an equal or greater opportunity, and sometimes the end of one chapter is simply the beginning of a better one. The key lies in having the courage to take that first step, even when the future seems uncertain. As these remarkable individuals have shown, it's never too late to rewrite your story and create a powerful second act. Their journeys teach us that persistence and courage ultimately lead to success.

The phrase “back to the drawing board” in paragraph 1 could be best replaced by _________.

Mặt Trời lên thiên đỉnh ở chí tuyến Nam vào ngày nào?