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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.
Describe the tasks of various body systems in breaking down carbohydrates into glucose to fuel the cells work
Define about the Metabolism of Copper? In food, most copper is present as Cu 2+ and some as Cu 1+ . This copper is bound to organic compounds especially protein. Gastric HCI p
Pulse Oximetry: Procedure: Pulse Oximetry is a safe and simple method of assessing oxygenation. An advantage is that this method is noninvasive and continuous. Previously,
How can coacervates be formed of phospholipids or polypeptides? Phospholipids are amphipathic molecules, i.e., they present a polar portion and a nonpolar portion. In contact w
Hounsfield Units: It is an arbitrary scale of gray values for CT. It is an indicator of bone density: - Trabecular bone has a range of 200 - Cortical bone has a range
BRONCHUS - In thorax trachea is devided in to 2 bronchi that enter into lungs of its own side. Rings present in it. BRONCHIOLES - These are branches of bronchus.
PROTEINS Protein was discovered by Mulder. Berzilius gave the catalytic concept & gave the word protein, which means first rank. Protein holds the 1st place in
What is covalent bonds? Covalent Bonds : Covalent bonds form when atoms share electrons in order to become more stable. Instead of gaining electrons or losing electrons enti
Occurrence of Vitamin D Cholecalciferol is synthesized in the skin by the action of ultraviolet light on 7-dehydrocholesterol which is widely distributed in animal fat. Vitami
introduction in fungai
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