Periodic Table - QS Study
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Why used d-block element rather than p-block element?

Catalyst: Catalyst is the substance which does not directly participate in the reaction but present in the reaction and increases or decrease the reaction rate.......

What is Stereoisomerism?

Consider two compounds containing the same ligands attached to the same central metal ion, but the arrangement of ligands in space about the central metal......

Explain Postulates of Werner’s Theory

Brief concepts of Werner’s theory of coordination compounds Alfred Werner studied the structure of coordination complexes and put forward his ideas in the year 1893......

Describe Werner’s Theory

Alfred Werner (1866-1919) French born Swiss chemist founded the modern theory on coordination compounds. His theory and pioneering experimental work on metal complexes won for......

Defects of Valence Bond Theory

Valence bond theory, primarily the work of Linus Pauling regarded bonding as characterized by the overlap of atomic or hybrid orbitals of individual atoms. Although......

Valence Bond Theory (VB Theory)

The postulates of valence bond theory (VB Theory) 1) The central metal atom/ion makes available a number of vacant orbitals equal to its coordination number. 2)......

Define Geometrical or Cis-trans Isomerism

Geometric isomers are possible for both square planar and octahedral complexes, but not tetrahedral. In a cis-isomer two identical (or) similar groups are adjacent to......

Explain Comparison of Lanthanides and Actinides

Lanthanides and Actinides both show close resemblance because these involve filling of f-subshells. Both have colored ions, low electronegativity, high re-activity and show magnetic properties.......

Describe Uses of Lanthanides and Actinides

Use of lanthanides A pyrophoric alloy which contains cerium, lanthanum and Neodymium; iron; aluminium; calcium, carbon and silicon is used in cigarette lighters, toys, flame......

How to Extract of Lanthanides from Monazite Sand?

Extraction of Lanthanides from Monazite sand The method used for extraction of lanthanides from monazite sand consists of the steps which have been shown in......

Describe Cause of Actinide Contraction

Cause of actinide contraction is the imperfect shielding by 5f-electrons. As we proceed from one element to the next one in actinide series, the nuclear......

Explain General Properties of Actinide Series

General Properties of Actinide Series (5f block elements) In 1923 Neils Bohr postulated the existence of an actinide series analogous to the lanthanide series. The......

Explain Consequences of Lanthanide Contraction

Important consequences of lanthanide contraction are given below: i) Basicity of ions Due to lanthanide contraction, the size of Ln3+ ions decreases regularly with increase......

Cause of Lanthanide Contraction

Cause of lanthanide contraction The lanthanide contraction is due to the imperfect shielding of one 4f electron by another in the same sub shell. As......

Explain General Properties of Lanthanides

General properties of Lanthanides Electronic configuration The electronic configuration of Lanthanides are listed in the table. The fourteen electrons are filled in Ce to Lu......