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He
Helium
Atomic Z: 2 · Mass A: 4
Proton (p⁺)
Neutron (n⁰)
Electron (e⁻)
He
Helium
Z = 2
Mass A = 4 u · Noble Gas
Protons (p⁺)
2 Neutrons (n⁰)
2 Electrons (e⁻)
2 Orbit Velocity1.0x
Orbit Rings
Nucleus Glow
Select Element (29)
Scientific Summary
Lightweight, colorless, odorless noble gas with a completely filled valence shell. Second most abundant element in the cosmos.
Did You Know?
Helium was discovered in the spectrum of the Sun before it was ever found on Earth!
Practical Applications
Cryogenic Cooling (MRI Scanners)
Party Balloons
Deep Sea Diving Gas
Arc Welding
Discovered By: Pierre Janssen & Norman LockyerYear: 1868