Marie Curie was a Polish-born French scientist who, with her husband, Pierre Curie (1859-1906), was an early investigator of radioactivity. From 1896, the Curies worked together. building on the results of Henri Becquerel, who had discovered radioactivity from uranium salts. Marie Curie discovered that thorium also emits radiation and found that the mineral pitchblende was even more radioactive than could be accounted for by any uranium and thorium content. The Curies then carried out an exhaustive search and in July 1898 announced the discovery of polonium, followed in December of that year with the discovery of radium. They shared the 1903 Nobel Prize for physics with Becquerel for the discovery of radioactivity. The Curies did not participate in Becquerel’s discovery but investigated radioactivity and gave the phenomenon its name. Marie Curie went on to study the chemistry and medical applications of radium, and was awarded the 1911 Nobel Prize for chemistry in recognition of her work in isolating the pure metal.At the outbreak of World War I in 1914. Marie Curie helped to equip ambulances with X-ray equipment and drove the ambulances to the front lines. The International Red Cross made her head head of its Radiological Service. She taught medical orde lies and doctors how to use the new technique. By the late 1920s, her health began to deteriorate: continued exposure to high-energy radiation had given her leukemia. She entered a sanatorium and died on July 4, 1934.

Throughout much of her life, Marie Curie was poor, and the painstaking radium extractions were carried out in primitive conditions. The Curies refused to patent any of their discoveries, wanting them to benefit everyone freely. They used the Nobel Prize money and other financial rewards to finance further research. One of the outstanding applications of their work has been the use of radiation to treat cancer, one form of which cost Marie Curie her life.

8.Why didn’t the Curies patent their discoveries?
answer choices
(A) They already had some money from Nobel Prize
(B) They were considered wealthy at that time
(C) They wanted their research to be used freely
(D) Becquerel had already patented their discoveries
-
9. The phrase “the pure metal” in last line (paragraph 1) refers to ….
answer choices
(A) uranium
(B) radiation
(C) thorium
(D) radium
-
10. From the text we know the following, except ….
answer choices
(A) A research of the Curies was based on a Becquerel’s research
(B) Marie Curie passed away after Pierre Curie had passed away
(C) The mineral pitchblende was more radioactive than thorium content
(D) Nobel Prize only recognized Marie Curie and Becquerel for the discovery of radioactivity
-
11. What is the best title of the passage?
answer choices
(A) How Radioactivity Changed the World
(B) Science and its applications
(C) The Discoveries of Marie Curie
(D) The History of Radioactivity
penjelasan dikit mohon bantuannya