Group 13 or Boron Group elements also have the name of Triels. This name originates from the Group having previously occupied the third position in an earlier version of the periodic table.

Elements of the Periodic Table
Elementsort icon Atomic numbersort icon Atomic weightsort icon Boiling pointsort icon Densitysort icon Heat fusionsort icon Heat vapoursort icon Melting pointsort icon Specific heat capacitysort icon Thermal conductivitysort icon
Aluminium 13 26.98 2723.16° K 2700 kg/m³ 10.68 kJ/mol 284.34 kJ/mol 933.16° K 209.38 J/kg/K 38.2 W/m/K
Boron 5 10.81 0° K 2340 kg/m³ 22.19 kJ/mol 536.01 kJ/mol 2303.16° K
Gallium 31 69.72 2510.16° K 5910 kg/m³ 302.96° K
Indium 49 114.82 2273.16° K 7310 kg/m³ 3.27 kJ/mol 224.87 kJ/mol 429.36° K 23.87 J/kg/K 11.1 W/m/K
Thallium 81 204.37 1730.16° K 11850 kg/m³ 4.27 kJ/mol 162.48 kJ/mol 576.16° K 38.94 J/kg/K 5.5 W/m/K
Amazon Books
Image of Mendeleev on the Periodic Law: Selected Writings, 1869-1905
Author: Dmitri Ivanovich Mendeleev
Publisher: Dover Publications Inc. (2005)
Binding: Paperback, 320 pages