Why is mercury the only liquid metal on the periodic table?

Question: Why is mercury the only liquid metal on the periodic table?
- Keywords:
  element,
  liquid,
  mercury,
  metal,
  periodic table
Asked by 358chea24 to Sarah on 17 Nov 2014.
- Sarah Harris answered on 17 Nov 2014:
  
  Because it’s bad at sharing electrons, so it’s easier to break the bonds between mercury atoms than other metal atoms in the periodic table – hence why it’s liquid at room temperature

358chea24 commented on 18 Nov 2014:

Thank you for answering my question Sarah. I never knew why mercury was a liquid on the periodic table but now I do!

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Question: Why is mercury the only liquid metal on the periodic table?