Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
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.
A vanishing point is where parallel lines that move off into the distance seem to converge. It's an artifact of perspective. The vanishing point for any set of lines that are paral
what is life span
Tricuspid Valve Replacement : It is done for organic tricuspid valve disease and at times for functional tricuspid I regurgitation. When done along with other procedures, it
Which two of the following changes (a - d) usually tend to occur in the plain dwellers when they move to high altitudes (3,500 m or more)? 1. Enhance in red blood cell size 2
Highly active antiretroviral therapy (HAART) - The treatment of HIV infection requires combination therapy known as highly active antiretroviral therapy (HAART) along with inte
1. Name four experimental techniques to determine protein-protein interactions other than X-ray & NMR techniques. 2. How common are Coiled-coil motifs? Where are they found? Giv
Diagnostic Clues 1) When pallor, decrease in temperature, and numbness are the only complaints, viability of the limb usually not threatened. A condition of pain, pallor,
Fluorescence Microscopy Certain compounds when exposed to short wavelength radiations, e.g., UV and X-rays. absorb and emit energy as light of a longer wavelength. This process o
Which of the following serves as an actuating signal, or as part of an actuating signal, in a positive feedback system? A. Blood plasma levels of PTH (Parathryroid Hormone).
State about the Recti and Oblique Muscles The extra-ocular muscles are mainly involved in the maintenance of postural tonicity and performance of quick contractions. These mus
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd