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Прочитайте текст. Marie and Pierre Curie knew that radium existed but they had to prove it because a...: ответ на тест 13743 - Английский язык

Прочитайте текст.
Marie and Pierre Curie knew that radium existed, but they had to prove it because a chemist believes in the existence of a new substance after seeing it, touching it, weighing it and finding out its atomic weight. They began working at that problem in 1898. Their task was to obtain pure radium. The way to separating radium was a difficult one. They could separate radium by treating large amounts of pitchblende.
In 1902 they succeeded in preparing a decigram of pure radium. Radium had something better than a beautiful colour, it was luminous. The discovery of radium gave them the possibility of discovering other radioactive substances.
Ответьте на вопрос:
What colour was radium?
Варианты ответов
  • Radium was grey.
  • Radium was of a pure colour.
  • Radium was of a beautiful colour.
  • Radium was luminous.
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Вопрос задал(а): Кирьянова Ольга Владимировна, 10 Апрель 2015 в 22:51
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Вопрос № 857105

Прочитайте текст.
Marie and Pierre Curie knew that radium existed, but they had to prove it because a chemist believes in the existence of a new substance after seeing it, touching it, weighing it and finding out its atomic weight. They began working at that problem in 1898. Their task was to obtain pure radium. The way to separating radium was a difficult one. They could separate radium by treating large amounts of pitchblende.
In 1902 they succeeded in preparing a decigram of pure radium. Radium had something better than a beautiful colour, it was luminous. The discovery of radium gave them the possibility of discovering other radioactive substances.
Ответьте на вопрос:
What colour was radium?
Radium was of a beautiful colour.
Radium was grey.
Radium was of a pure colour.
Radium was luminous.

Вопрос № 1104829

Прочитайте текст.
Pierre Curie became famous for his work on radioactivity and magnetism. From an early age he had great ability in mathematics. This led to his graduating from the University of Paris at just 18. His marriage to Paris immigrant Maria Sklodowska was the beginning of a world-famous partnership. Together they isolated two new radioactive elements, polonium and radium, and shared a Nobel Prize for physics in 1903 for their discovery of radioactivity. Pierre also worked on the properties of radioactive elements, identifying the existence of positive, negative, and neutral particles within an atom.
Ответьте на вопрос:
What is Pierre Curie famous for?
He is famous for his marriage to Paris immigrant Maria Sklodowska.
He is famous for great ability in mathematics.
He is famous for his work on organic chemistry.
He is famous for his work on radioactivity and magnetism.

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