He Helium 2 4.002602 18 1 s 2 -272.2 -268.9 1s2 2 0.0001785 5.5E-7% Colorless Hexagonal 4.16 {"1":"2372.3","2":"5250.5"} 2377 0 32 0 31.8 0.021 0.0845 5.193 0.152 0 Gas, Diamagnetic, NobleGas, Nonmetal, Stable, Natural HEE-li-em Light, odorless, colorless, tasteless inert gas. Second most abundant element in the universe. Sixth most abundant in the earth's atmosphere. Used in balloons, deep sea diving & welding. Also used in very low temperature research. Found in natural gas deposits & in the air (5 parts per billion) Constantly lost to space; replenished by radioactive decay (alpha particles). a8FJEiI5e6Q Helium

Fermium was discovered as a component of the debris of the first hydrogen bomb explosion in 1952.

It was identified by Albert Ghiorso and co-workers at the University of California, Berkeley in collaboration with the Argonne and Los Alamos National Laboratories, in the fallout from the Ivy Mike nuclear test.

The new element was produced by the nuclear fission of 17 neutrons with uranium-238. Named after Nobel laureate Enrico Fermi, one of the pioneers of nuclear physics 2 1895 William Ramsay London, England From the Greek word "helios" meaning "sun"

Fermium is harmful due to its radioactivity

Sixteen isotopes of fermium are known to exist

Fermium is used for scientific research purposes only.