The Actinide Series (5f block elements):
In the year 1923 Neils Bohr postulated the survival of an actinide sequence analogous to the lanthanide series.
The fifteen elements from actinium to lawrencium comprise the actinide sequence of the periodic table.General Properties of Actinide Series:
The general electronic configuration of actinides is [Rn] 5f0,1-14 6d0,1-2 7s2, here Rn stands for radon core.Oxidation states:
These elements display the oxidation states of +2, +3, +4, +5 and +6. Out of these, +4 oxidation state is most general state.Radii of M3+ and M4+ ions:
The ionic radius of actinide elements reduce steadily as we move all along the actinide sequence. The steady reduction in the ionic radius with raise in nuclear charge is termed as actinide contraction and is analogous to the lanthanide contraction.Cause of actinide contraction:
Cause of actinide contraction is the deficient shielding by 5f-electrons. Since we proceed from one element to the another one in actinide series, the nuclear charge raises by +1 at each next element that is not compensated due to the poor shielding effect of 5f orbitals due to their more diffuse shape. Therefore as the atomic number rises, the inward pull experienced by 5f-electrons raise. Consequently steady reduction in size takes place in the actinide sequence.
Latest technology based Chemistry Online Tutoring Assistance
Tutors, at the www.tutorsglobe.com, take pledge to provide full satisfaction and assurance in F Block Elements homework help via online tutoring. Students are getting 100% satisfaction by online tutors across the globe. Here you can get homework help for F Block Elements, project ideas and tutorials. We provide email based F Block Elements homework help. You can join us to ask queries 24x7 with live, experienced and qualified online tutors specialized in F Block Elements. Through Online Tutoring, you would be able to complete your homework or assignments at your home. Tutors at the TutorsGlobe are committed to provide the best quality online tutoring assistance for Inorganic-Chemistry Homework Help and assignment help services. They use their experience, as they have solved thousands of the Chemistry assignments, which may help you to solve your complex issues of F Block Elements. TutorsGlobe assure for the best quality compliance to your homework. Compromise with quality is not in our dictionary. If we feel that we are not able to provide the homework help as per the deadline or given instruction by the student, we refund the money of the student without any delay.
Applications of Mass Spectrometry tutorial all along with the key concepts of Gas Chromatography-Mass Spectrometry, Ionization methods used in GC-MS, Liquid Chromatography-Mass Spectrometry, Thermospray, Electrospray (ES) Ionization, Atmospheric Pressure Ionization and Tandem Mass Spectrometry
Waveguides tutorial all along with the key concepts of Rectangular waveguide, Transmission of waves in a pair of parallel conducting, poynting vector, Transverse Magnetic (TM) waves
Amino Acids tutorial all along with the key concepts of Occurrence of Amino Acids in Nature, Basic Structure of Amino Acids, D- and L-Configurations of Amino acids and Structures of Some Amino Acids
Pedigree analysis tutorial all along with the key concepts of Autosome, Chromosome number, Karyotype, Homologous chromosome, Nondisjunction, Dosage compensation and Codominance
tutorsglobe.com irreversible enzyme inhibition assignment help-homework help by online enzyme inhibitor-concepts tutors
Rigid Body Dynamics II tutorial all along with the key concepts of Torque, Angular Momentum, Conservation of Angular Momentum and Its Applications, Top and Gyroscope
Theory and lecture notes of Money, Prices and Inflation all along with the key concepts of money, prices, and inflation, The Usefulness of Money, Units of Account, Coincidence of Wants. Tutorsglobe offers homework help, assignment help and tutor’s assistance on money, prices and inflation.
Application of the Coumarin and Chromones Ring tutorial all along with the key concepts of Warfarin, Racemic synthesis, Asymmetric hydrogenation, Hetero-Diels-Alder cycloaddition and Sodium Cromoglycate
tutorsglobe.com alternation of generations assignment help-homework help by online bryophytes tutors
tutorsglobe.com advantages-disadvantages of self-pollination assignment help-homework help by online self pollination tutors
tutorsglobe.com preventing ozone depletion assignment help-homework help by online ozone layer depletion tutors
Programming in C-assignment help, homework help and key concepts of Programming in C, Variables, Types, Type Declarations, Constants, getchar, putchar, printf, While Statement, Null Statement, Else Clause and Conditional Expressions
tutorsglobe.com shape of the petals assignment help-homework help by online corolla tutors
Introduction to Marginal Costing and Break Even Analysis - Marginal Costing is not a technique of costing such as job, batch or contract costing. It is actually a method of costing where only variable manufacturing costs are taking into account when determining the cost of goods that are sold and also for valuation of inventories.
tutorsglobe.com museum studies assignment help-homework help by online humanities tutors
1946086
Questions Asked
3689
Tutors
1445813
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!