Go-astronomy logo

Elements

Helium - He

The element Helium, atomic number 2, is formed from Big Bang, which results from fusion.

      1. Name:
      2. Helium
      1. Symbol:
      2. He
      1. Atomic number (protons):
      2. 2
      1. How created:
      2. Big Bang
      1. Process:
      2. fusion
      1. Group (column):
      2. 18
      1. Period (row):
      2. 1
      1. Atomic weight:
      2. 4.002602000
      1. Melting point:
      2. 0.95 K
      1. Boiling point:
      2. 4.22 K
      1. Density:
      2. 0.0001785 g/cm3

    Find your inner astronomer. Your complete guide to amateur astronomy.