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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.
What is the significance of Pronephric? The first, or ancestral, kidney that appears in the anterior part of the coelomic cavity and is connected to the archinephric duct. In a
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Name the various suturing techniques There are a various suturing techniques each suited for a particular situation. Few of the common suturing techniques are mentioned here
Risk analysis- Definiton of Food Food : Any substance, whether processed, semi- processed or raw which is intended for human consumption, containing drinks, chewing gu
Define the Fluidized Dryers? Fluidization occurs when a flow of fluid upwards through a bed of particles (ranging from fine powders to particulate foods such as diced carrots)
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Which of the following serves as an actuating signal, or as part of an actuating signal, in a negative feedback system? A. Action potentials in the fibers of the diaphragm musc
Is viruses classified as living organism? If yes/no why
Name two ways in which the chances of hypothermia can be reduced during outdoor activities. Eating well before going out and wearing warm, wind-proof clothing can reduces the c
Control of Pollution We have seen that pollution affects human health, 'vegetation, crop yield, trees, fisheries, forests, buildings, archaeological monuments, tourism. These
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