Multiple choice general knowledge science & technology

The metal mercury is

  1. the hardest known metal

  2. a liquid at room temperature

  3. highly radioactive

  4. extensively used in aircraft construction
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Mercury is unique among metals in being liquid at standard room temperature (around 20°C or 68°F). This is due to its weak metallic bonding and relatively low melting point of -38.83°C. It is not the hardest metal, not highly radioactive, and not used in aircraft construction.

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