December 2011
Beginner
560 pages
12h 42m
English
Content preview from Basic Concepts of Inorganic Chemistry, 2nd Edition
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14
Group — 13 (IIIA) B, Al, Ga, In, TI
Boron, Al, Ga, In and Tl are p — block elements and have three valence electrons (ns2np1).
Group in p — block = valence electrons + 10.
So, these elements belong to group — 13.
Electron configuration and core electrons
Table 14.1
The difference in the number of core electrons and presence of 4f electrons in Tl has profound effect on the chemistry of these elements. Valence orbitals include p-orbitals. With the filling of p — orbitals, non-metallic property develops. Boron is thus a non-metal (slightly metallic). However, non-metallic nature decreases with increase in atomic number and Al, Ga, In and Tl ...
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