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Explain the Bohr's model?
Bohr's Model : Electrons move around the nucleus at tremendous speeds and occupy most of the space in an atom. The exact position or location of an electron at any given moment can only be predicted on the basis of probability. In a widely accepted model of the atom originally proposed by Neils Bohr, electrons move in spherical spaces called orbitals, or shells, which correspond to different energy levels. Electrons are distributed according to their energy levels, with the higher energy electrons residing in the outer shells. The innermost shell contains only 2 electrons. In common elements, the next outer shells contain 8 electrons each.
Atoms either gain, lose, or share electrons in the outer shells. Because the outer shells of many atoms are incomplete, most atoms will interact with other atoms during chemical reactions to achieve stable outer shells. The number of electrons that an atom must either gain, lose, or share to complete the outer shell is known as its valence, or oxidation number. For example, carbon has six electrons, two in its first energy level and four in the outer level. Thus, it can form a stable outer shell by gaining, losing, or sharing four electrons to complete its outer shell when it joins, or bonds, with another atom or atoms to form a compound. The following table lists the oxidation numbers of some important ions frequently used in Biology.
In almost all animal groups, the mode of speciation is geographic speciation. It is essential that a population which is a prospective new species is geographically isolated from t
Explain Global burden in the history of mart disease? In 2001, 17 million people died of CVD of all types. The most important causes were ischemic heart disease (IHD), Hyperten
How do mineral salts participate in enzymatic activity? Many mineral salts are cofactors of enzymes. i.e., they are substances without which enzymes do not work.
Molecular Biology Transgenesis: pro-nuclear injection of isolated gene into fertilised egg cell, cell divides to form embryo, then embryo implanted into surrogate.
Define Improvement of cereal proteins - Mutual supplementation? Improvement of cereal proteins: Cereals, in general, are limiting in lysine and threonine while legumes, milk, m
It is elimination of an antigen or antibody from a sample by the process of adsorption, to which the complimentary antigen or antibody is bound.
Define Utilization of Soy Protein Concentrate? Soy protein concentrates are used in food products for their nutritional characteristics or for their functional properties or fo
These views are obtained by placing the transducer in the suprasternal notch with the ridge pointing cephalad. The neck is extended during the suprasternal notch examination. Thi
significance of amoebozoa
what re conjugated proteins and how are they classified?
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