Records & extremes
The champions of the table.
Every record here is computed live from the snapshot — no hall-of-fame list to go stale. Records only count elements with a published value, and each card says how many that is.
Heaviest atom
Ts Tennessine 294 ulargest atomic mass · among the 118 elements with a published value
Lightest atom
H Hydrogen 1.008 usmallest atomic mass · among the 118 elements with a published value
Densest
Hs Hassium 40.7 g/cm³most mass packed into the least space · among the 114 elements with a published value
Least dense
H Hydrogen 0.08988 g/Lthe lightest stuff there is · among the 114 elements with a published value
Hardest to melt
W Tungsten 3695 Khighest melting point · among the 107 elements with a published value
Easiest to melt
He Helium 0.95 Klowest melting point · among the 107 elements with a published value
Hardest to boil
W Tungsten 6203 Khighest boiling point · among the 104 elements with a published value
Easiest to boil
He Helium 4.222 Klowest boiling point · among the 104 elements with a published value
Greediest for electrons
F Fluorine 3.98highest electronegativity (Pauling) · among the 100 elements with a published value
Most generous with electrons
Cs Cesium 0.79lowest electronegativity (Pauling) · among the 100 elements with a published value
Toughest grip on its electron
He Helium 2372.3 kJ/molhighest first ionization energy · among the 104 elements with a published value
Loosest grip on its electron
Cs Cesium 375.7 kJ/mollowest first ionization energy · among the 104 elements with a published value
Liquid over the widest range
Np Neptunium 3535 Kbiggest gap between melting and boiling · among the 102 elements with a published value
Liquid over the narrowest range
Ne Neon 2.5440000000000005 Ksmallest gap between melting and boiling · among the 102 elements with a published value
The only liquids in the room
Of 118 elements, just 3 are liquid at room temperature.
The airborne set
11 elements are gases at room temperature — everything else holds its shape.