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What is the heliam........​

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★ Helium is a chemical element with the SYMBOL He and atomic NUMBER 2. It is a colorless, odorless, tasteless, non-toxic, inert, MONATOMIC gas, the first in the noble gas group in the periodic table. Its boiling POINT is the lowest among all the elements.

  • Symbol: He
  • Atomic mass: 4.002602 u
  • Atomic number: 2
  • Electron configuration: 1s2
  • Boiling point: -268.9 °C
  • Discoverers: PIERRE Janssen, Per Teodor Cleve, Norman Lockyer



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