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Which one of the following pairs of elements is liquid at room temperature and at normal pressure?

Options

  1. AGallium and Bromine
  2. BMercury and Bromine
  3. CGallium and Mercury
  4. DGallium and Caesium

Correct answer

B. Mercury and Bromine

Step-by-step solution

Bromine and mercury are the two elements that remain liquid at room temperature and standard pressure. Two elements are liquid at the temperature technically designated "room temperature" or 298 ~K (25^ C ) and a total of six elements that can be liquids at actual room temperatures and pressures. There are eight liquid elements if you include recently-discovered synthetic elements. Room temperature is a loosely defined term that can mean anywhere from 20^ C to 29^ C . For science, it's usually considered to be eith

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