chromium is a typical hard metal while mercury (H) is a liquid explain
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It maybe because Cr has many unpaired electrons which helps in forming strong metallic bonds while Hg has no unpaired electrons so it does not show metallic bonds and liquifies at a lower temperature.
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Answer: Chromium is hard metal while mercury is a liquid.
Explanation: Cr has five unpaired D-electrons in the d-subshell (3d5, 4s1) hence, metallic bonds are very strong. In Hg, all the d-orbitals are fully filled (3d10, 4s2) and hence, the metallic bonding is very weak.
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