The group 13 of the periodic table consists of the elements Boron, aluminium, gallium indium, thallium and the newly discovered elements ununtrium(uut). Occurrence Boron occurs in two forms . Its abundance in the earth's crust is very low. Boron mainly occur as: 1) Orthoboric acid, H3BO3 2)Borax, Na2[B4O5(OH)4].8H2O or Na2B4O7.10H2O 3)kernite, … [Read more...] about Physical Properties Of Boron Family
p-Block Elements
General Characteristics of p-Block elements
Elements in which the last electron enters any one of the three p orbitals of their respective outermost shells are called p block elements. A p-subshell has three degenerate p-orbitals, each of which can accommodate 2 electrons, therefore, in all, there are six groups of p-block elements i.e. group 13,14,15, 16, 17 and 18 each containing 6 elements. The atoms of elements … [Read more...] about General Characteristics of p-Block elements
Silicon Tetrachloride
Preparation Silicon tetrachloride is prepared by heating either silicon or silicon carbide with chloride. Si (s) + 2 Cl2 (g) ------> SiCl4 (l) SiC(s) + 4 Cl2 (g) -------> SiCl4 (l) + CCl4 (l) Properties 1) It is a volatile liquid , b.p. 330.57 K. 2) Hydrolysis Hydrolysis of SiCl4 gives silicic acid , Si(OH)4 which upon further heating undergoes … [Read more...] about Silicon Tetrachloride