Question

why cs is softest element ?
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Answer 1

Explanation:

Caesium (IUPAC spelling[6]) (also spelled cesium in American English)[note 1] is a chemical element with the symbol Cs and atomic number 55. It is a soft, silvery-golden alkali metal with a melting point of 28.5 °C (83.3 °F), which makes it one of only five elemental metals that are liquid at or near room temperature.

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Answer 2

Answer:

Caesium (IUPAC spelling) is a chemical element with the symbol Cs and atomic ... Of all elements that are solid at room temperature, caesium is the softest: it has a hardness of 0.2 Mohs.