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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.
Isomerization of citrate Isomerization of citrate: In this step, citrate is isomerized to isocitrate by aconitase which has iron-sulphur centre as its prosthetic grou
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Define absorption, transport and excretion of magnesium? Magnesium absorption to some extent is similar to that of Ca. Absorption of Mg occurs throughout the small intestine, a
how does chamaleon change its colour
What is a pipette and how is it used? There are lots of types of pipettes (or pipette), but most are basically a fancier version of a medicine dropper or eye dropper. They are
What are the main factors that alter the speed of enzymatic reactions? The major factors that change the speed of enzymatic reactions are temperature, pH and substrate concentr
Explain Spontaneous Closure of Defects in details? Some defects have a tendency towards spontaneous closure and this can influence the timing of intervention. The defects known
Define Feeding and Nutritional Management for Neuro trauma? The main objective of nutritional management is to counteract the hypermetabolism associated with inflammation. The
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