Aluminum ,thallium, Chemistry

Assignment Help:

 

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.

 

 

1937_Untitled.png

 

 

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.

 


Related Discussions:- Aluminum ,thallium

Technique error affect the reported activation energy, 1. The temperature o...

1. The temperature of the warm water bath is recorded too high. How will this technique error affect the reported activation energy for the reaction - too high or too low? explain

Law , explain law of equivalence..

explain law of equivalence..

Number of electron does species have, Number of electron does species have ...

Number of electron does species have The H2 2- ion can be conceived to result from the combination of two hydride ions (H-). This species have four electrons; two occupy the b

#chemical thermodynamics, give an example of a compound whose empirical for...

give an example of a compound whose empirical formula & molecular formula are same.

Homework problem, If you were to combine 120.0 mL of 0.100 M HCL with 3.25 ...

If you were to combine 120.0 mL of 0.100 M HCL with 3.25 grams of calcium metal, how many grams of hydrogen gas would you make?

Electrovalent compounds, Electrovalent compounds are: (1) Good conducto...

Electrovalent compounds are: (1) Good conductor of electricity (2) Polar in nature (3) Low M.P. and low B.P. (4) Easily available Ans:  Polar in nature

Acyl chloride , what is the mechanism of acyl chloride reaction with alcoho...

what is the mechanism of acyl chloride reaction with alcohol and why does it react in this way ?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd