Question

what is helium?????

thanks!​

Answer 1

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

Symbol: HeAtomic mass: 4.002602 u

Symbol: HeAtomic mass: 4.002602 uAtomic number: 2

Symbol: HeAtomic mass: 4.002602 uAtomic number: 2Electron configuration: 1s2

Symbol: HeAtomic mass: 4.002602 uAtomic number: 2Electron configuration: 1s2Discovered: 1868

Symbol: HeAtomic mass: 4.002602 uAtomic number: 2Electron configuration: 1s2Discovered: 1868Discoverers: Pierre Janssen, Norman Lockyer