All four Vietnamese students competing in the 59th Mendeleev International Chemistry Olympiad win medals. Photo: VNA

The two gold medalists are Tran Trung Kien, a 12th grader from the Hanoi-Amsterdam High School for the Gifted and Nguyen Ngo Duc, a 12th grader from the Phan Boi Chau High School for the Gifted in Nghe An province.

The silver medals went to Dinh Trong An, a 12th grader from the the High School for Gifted Students in Natural Sciences, under the Vietnam National University, Hanoi and Tran Hoang Nam, an 11th grader also from the Hanoi-Amsterdam High School for the Gifted.

The Mendeleev Olympiad took place in Belo Horizonte, Brazil, from May 5 to 12. It is regarded as one of the world’s most prestigious and challenging competitions in chemistry for high school students. This year's Olympiad attracted 192 contestants from 40 countries and territories.