ChemGeniusWebsite undergoing updates usage may be affected.Interactive Periodic Table
Explore all 118 chemical elements — click any element to view its atomic number, atomic mass, electron configuration, electronegativity, melting point, boiling point, and state of matter. Use the temperature slider to see which elements are solid, liquid, or gas at any temperature from −273°C to 5000°C.
0°C (273K)
-273°C5000°C
State at Current Temperature:
Solid
Liquid
Gas
Alkali Metal
Alkaline Earth
Transition Metal
Post-transition
Metalloid
Nonmetal
Halogen
Noble Gas
Lanthanide
Actinide
H
Hydrogen
nonmetal
Atomic Number1
Atomic Mass1.0080 u
State at {temperature}°CGas
Density0.00008988 g/cm³
Melting Point-259.14°C
Boiling Point-252.87°C
Electron Configuration1s¹
Electronegativity2.2