Question

what is the helium....​

Answer 1

Answer:

Explanation:

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, Norman Lockyer, Per Teodor Cleve

Answer 2

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