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.
Auxins The history of discovery of auxin is a fascinating chapter in plant physiology. The hormone auxin was discovered first, through some elegant experiments by Charles Darw
describe the function of a bacterial flagellum
Do moulds grow better where it is dark or light? This time leave one culture dish in a warm place where it receives light all the time. Place the other dish in a warm dark plac
How Phosphorus in Blood is presented? Phosphorus in Blood is Present as: 1. Inorganic phosphorus in the form of HPO 4 or H 2 PO 4 2. Organic or ester phosphorus such
Q. Management goals for diverticular disease? The management goals discussed above are basic to prevention of diverticulitis. However, diet therapy during diverticulitis may b
Q. How do cells of neoplastic tumors obtain oxygen and nutrients and release wastes? In the neoplastic tumors a phenomenon called as angiogenesis occurs. The Angiogenesis is th
Q. What are the main characteristics of the age pyramids of developed countries? In the stabilized human population the age pyramid has a narrower base since the reproduction r
Observing the development of flowers into fruit Collect specimens of flowers in dissimilar stages of maturity from newly opened buds to specimens in which the petals have falle
in what part of the human body aschelminthes found?
How are ecological interactions classified? Ecological interactions are divided as intraspecific or interspecific interactions and as harmonious or inharmonious interactions.
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