Within the Periodic TableHelium is a chemical element with symbol 'He' and atomic number 2. It is the lightest element in the universe. It is a noble gas, named for the Greek god of the sun ἥλιος, Helios. It was first detected as an unknown yellow spectral line signature in sunlight during a solar eclipse in 1868.
Displayed are symbol, name, atomic number (above left) and atomic weight.
Overall size 30x30 cm, image 18,5*18,5 cm. Hahnemühle German Etching. Passe-partout card natural white.
High quality frame, 9 mm in sight, 16 mm deep, aluminium with solid riveted connections in the corners, black. Integrated 3-point hanging system.