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Perhaps because Lewis structures and VBT often depict the same structure as the most stable state, this misinterpretation has persisted. [7] However, as has been consistently demonstrated with VBT calculations, the lowest energy state is that with two, three electron π-bonds, which is the triplet state. [8]
Additionally, valence bond theory cannot explain electronic transitions and spectroscopic properties as effectively as MO theory. Furthermore, while VBT employs hybridization to explain bonding, it can oversimplify complex bonding situations, limiting its applicability in more intricate molecular geometries such as transition metal compounds. [11]
[26] [27] Again in 2022, a new controversy started when both CBSE and NCERT removed topics regarding Islamic Empires in the class 12 history textbook and chapters like “Challenges to Democracy” in the class 10 political science subject and many others, saying it is necessary to reduce syllabus to reduce examination pressure on students by ...
The NCF 2005 serves as a guideline for syllabus, [1] textbooks, and teaching practices for the schools in India. The NCF 2005 [ 2 ] has based its policies on previous government reports on education, such as Learning Without Burden [ 3 ] and National Policy of Education 1986–1992, [ 4 ] and focus group discussion. [ 5 ]
For example, the hexaaquo complexes M(H 2 O) 6 are all octahedral for M = V 3+, Mn 3+, Co 3+, Ni 2+ and Zn 2+, despite the fact that the electronic configurations of the central metal ion are d 2, d 4, d 6, d 8 and d 10 respectively.
In biology, cell theory is a scientific theory first formulated in the mid-nineteenth century, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells.
The clonal selection theory can be summarised with the following four tenets: Each lymphocyte bears a single type of receptor with a unique specificity (generated by V(D)J recombination).
Molecular biology – study of biology and biological functions at the molecular level, with some cross over from biochemistry. Structural biology – a branch of molecular biology, biochemistry, and biophysics concerned with the molecular structure of biological macromolecules. Health sciences and human biology – biology of humans.