Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
GROUP 13: ALUMINUM TO THALLIUM
The substance aluminum, indium, gallium and thallium have valence electron configurations (ns)2(np)1 and for the lighter elements their chemistry is dominated by the +3 oxidation state. The group trends are very different from those in groups 2 and 1. The Al3+ ion has a large radius ratio and is rigidly polarizing, so that significant deviations from simple ionic behavior are usually observed. The filling of the d shells (and 4f in period 6) goes to decreased electropositive character for Tl and Ga, In similar to that shown in group 12. There is also a progressive stabilization of lower oxidation states in lower side of the group.
Aluminum is common metallic element in the Earth's crust, being a constituent of almost all silicate minerals. Weathering leaves deposits of the very insoluble aluminum minerals Al(OH)3 and AlO(OH), known together as bauxite, which forms the principal source of the element. The metal is produce by electrolysis of fused cryolite Na3[AlF6]. Although reactive when clean, the metal easily builds a very resistant oxide film, which performs widespread applications as a lightweight construction material and in other vessels and cooking.
In, Ga and Tl are much less common substance, collect in small amounts from sulfide minerals of other elements and used only in specialized applications. The metals are less performing than aluminum in which the much bigger negative slope (negative electrode potential of Al is apparent. Thallium elements are extremely toxic but do not usually pose an environmental hazard because they are little used.
The maximum number of electrons which each sub-shell can occupy is: (1) 2n 2 (2) 2n (3) 2 (2l+1) (4) (2l+1) Ans: 2
Why p-nitro toluene is higher boiling point than o-nito toluene ? Ans) The term hydrogen bonding is used to define dipole-dipole attractive forces of this type. The proton invol
chromotographic method explain
Alkyl groups - IUPAC System of Naming Organic Compounds These groups involves one hydrogen atom less as compared to the alkane. These groups are named by substituting the suff
Chloroform or trichloromethane, CHCl 3 It is a significant trihalogen derivative of methane. It was given by Liebig in year 1831 and its name chloroform was proposed by Dumas
Chloride of metal is MCl 2 . The formula of its phosphate will be: (1) M 2 PO 4 (2) M 3 (Po 4 ) 2 (3) M 2 (
about potassium manganate
what is the difference between both independent and dependent variables?
formula of acetic acid
what is inductomeric effect
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd