Atomic number 2
Atomic mass- 4.002602 amu
Atomic symbol- He
number of protons, electrons, and neutrons- 2 electrons, 2 protons, 2 neutrons
Helium is the 1st period 18 group
Helium was discovered on August 18th, 1868. Helium was discovered by a french astronomer Jules Janssen. Helium can be found in our universe. Helium is one of the most abundant elements in the universe but, is not found in earth alot.
Helium is a nonmetal. Helium's density is 0.1786 g/l. Helium is normally seen as gas ,but can be a liquid. Helium's boiling point is -452.070.