Explain the bohr''s model, Biology

Assignment Help:

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.

1355_bohr model.png

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.

1576_table bohr model.png


Related Discussions:- Explain the bohr''s model

Energy demand for vigorous or vigorously active lifestyles, Determine Energ...

Determine Energy demand for Vigorous or vigorously active lifestyles? These people engage regularly in strenuous work or in strenuous leisure activities for several hours. Exam

Advantages and disadvantages of tissue valves, Advantages of Tissue Valv ...

Advantages of Tissue Valv es   Need for anticoagulation therapy is only for a short duration in xenograft and only there is rare need for anticoagulation therapy in au

Assume the effect on turnover, Explain two ways in which a changing climate...

Explain two ways in which a changing climate may impact the nutrient cycle. Predict  the effect on turnover.

Reciprocal crosses , RECIPROCAL CROSSES Similar results were obtained w...

RECIPROCAL CROSSES Similar results were obtained with reciprocal crosses also. A reciprocal crosses involves the same traits but carried by sexes opposite to those in the origi

Fats, definition and explanation of fats

definition and explanation of fats

Geographic speciation, In almost all animal groups, the mode of speciation ...

In almost all animal groups, the mode of speciation is geographic speciation. It is essential that a population which is a prospective new species is geographically isolated from t

What about whale fins compared to fish fins, Q. Are the limbs modified into...

Q. Are the limbs modified into wings of bats and the wings of birds instance of evolutionary homology or analogy? What about whale fins compared to fish fins? Bird and Bat wing

What do you mean by pelvic girdle, What do you mean by Pelvic Girdle? B...

What do you mean by Pelvic Girdle? Bones in vertebrates which connect the appendages on left and right side of the posterior appendicular skeleton to each other. Pelvic girdles

Consequences of air pollution, Consequences of Air Pollution The physi...

Consequences of Air Pollution The physiological effects of toxic pollutants on living beings can be of two types: Acute effects and Chronic effects. Acute effec

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

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!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd