Block structure-many-electron atoms, Chemistry

Assignment Help:

 

The filling of the table defined above leads to a natural division of the periodic table into blocks according to the outer electron configurations of atoms (see Fig. 2). All s block elements have configurations (ns)1 or (ns)2. In periods 2 and 3 these are followed by the p block with configurations (ns)2(np)x. Lower p block elements are same as the (n-1)d orbitals are too tightly bound to be chemically important. The p and s blocks are collectively known as

 

 

722_Untitled.png

 

Fig. 1. Showing the order of filling of orbitals in the periodic table.

 


2159_Untitled.png

 

 

Fig. 2. Structure of the periodic table, showing the s, p, d and f blocks.

 

Main groups: d-block elements of periods 4, 5 and 6 have (n-1)d and ns outer electrons, and are known as transition elements. Their configurations give some complexities as the s and d orbitals are similar in energy. The f-block elements are known as the actinides (5f) and lanthanides (4f). For ease of presentation they are usually shown as separate blocks below the main table. In the case of the lanthanides, this procedure is justified as the elements have very similar properties.

 


Related Discussions:- Block structure-many-electron atoms

Lowest vacant state., The π electrons of a conjugated molecule can be model...

The π electrons of a conjugated molecule can be modeled as a particle in a box where the box length is a little more than the length of the conjugated chain. The Pauli exclusion pr

Physical properties of acetophenone - aldehydes and ketones, Physical prope...

Physical properties of Acetophenone - Aldehydes and Ketones a. Acetophenone is a colourless crystalline solid with melting point 20°C and boiling point 202°C. b. Acetophenon

Explain collision theory, Q. Explain Collision Theory? Ans. Why do...

Q. Explain Collision Theory? Ans. Why do some reactions take place faster than others? What actually happens in a chemical reaction? Consider a gaseous reaction of the typ

Lubricant., Explain the mechanism of fluid film or hydrodynamic lubrication...

Explain the mechanism of fluid film or hydrodynamic lubrication.

#title.REACTIONA KINETICS, HOW MANY HALF LIVES ARE REQUIRED FOR THE CONCENT...

HOW MANY HALF LIVES ARE REQUIRED FOR THE CONCENTRATION OF REACTANT TO DECREASE BY 1.56 PERCENT OF ITS ORIGINAL VALUE

Bond strength in hydrocarbons, Bond strength in hydrocarbons As much sh...

Bond strength in hydrocarbons As much shorter is the bond size, the greater is the compression among molecules atomic nuclei and therefore greater is the strength of that bond.

Salicylic acid, physical properties of salicylic acid?

physical properties of salicylic acid?

Alcohols, Action of grignard reagents on carbonyl compounds with examples

Action of grignard reagents on carbonyl compounds with examples

Disaccharides - biomolecules, Disaccharides - Biomolecules The disacch...

Disaccharides - Biomolecules The disaccharides give in on hydrolysis two monosaccharides. Those disaccharides that generates two hexoses on hydrolysis contain a general formul

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