0sciencechallengingWhich halogen is a volatile red-brown liquid at room temperature?Show AnswerSource: en.wikipedia.orgShare
0scienceeasyWhat is the pH of pure water at 25 degrees Celsius?Show AnswerSource: en.wikipedia.orgShare
0scienceeasyWhat is the chemical name for ordinary table salt?Show AnswerSource: en.wikipedia.orgShare
0sciencenormalWhich two radioactive elements were discovered by Marie and Pierre Curie?Show AnswerSource: en.wikipedia.orgShare
0sciencechallengingWhich French chemist gave oxygen its name in 1778?Show AnswerSource: en.wikipedia.orgShare
0scienceeasyWhat is the most abundant element in the universe?Show AnswerSource: en.wikipedia.orgShare
0sciencenormalWhat name is given to atoms of the same element that have different numbers of neutrons?Show AnswerSource: en.wikipedia.orgShare
0sciencechallengingWhat is the most abundant metal in the Earth's crust?Show AnswerSource: en.wikipedia.orgShare
0sciencechallengingWhich element, atomic number 2, was detected in the spectrum of the Sun in 1868 before it was found on Earth?Show AnswerSource: en.wikipedia.orgShare
0geographychallengingWhat is the name of the deepest known point of the Earth's seabed, in the Mariana Trench?Show AnswerSource: en.wikipedia.orgShare
0geographynormalWhich Portuguese explorer gave the Pacific Ocean its name?Show AnswerSource: en.wikipedia.orgShare
0geographynormalThe Great Barrier Reef lies off the coast of which Australian state?Show AnswerSource: en.wikipedia.orgShare
0geographynormalWhich warm Atlantic current begins in the Gulf of Mexico and flows up the eastern coast of the United States?Show AnswerSource: en.wikipedia.orgShare
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