CHM204
Question: Under extremely ___________, hydrogen does become metallic and behaves like an alkali metal
Answer: high pressure
Question: The third most abundant element in the earth\’s crust with abundance of 7.4% is
Answer: aluminium
Question: Hydrogen atoms can also gain an electron to form the negatively charged ion called ________
Answer: hydride
Question: The alkaline earth metals are silvery coloured, soft, and ___________ metals
Answer: low-density
Question: Which of group 2 metals is not always considered an alkaline on earth due to its radioactivity
Answer: radium
Question: Who was the the first scientist to obtain samples of the metals by electrolysis of their molten earths
Answer: Humphrey Davy
Question: Magnesium reacts only with steam and __________ reacts with hot water
Answer: calcium
Question: The group 2 metal that does not react with water or steam, and its halides are covalent is___________
Answer: beryllium
Question: The only member of boron family (group 13) which is unconfirmed is
Answer: ununtrium
Question: The realisation that \’earths\’ were not elements but compounds was attributed to the chemist
Answer: Antoine Lavoisier
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