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

Ecosystem, what is the main excretory organ of a lizard

what is the main excretory organ of a lizard

Zoology , phylum platyhelminthes

phylum platyhelminthes

Strain of fusarium moniliforme, Q. Strain of Fusarium moniliforme? It w...

Q. Strain of Fusarium moniliforme? It was first obtained from a strain of Fusarium moniliforme isolated from southern leaf blight- damaged corn seed as a water soluble toxin.

Determine the biological diversity of an ecosystem, Is monoculture a system...

Is monoculture a system that contributes to great biological diversity of an ecosystem? Monoculture means that in a large area a single crop (only single species of plant) is c

Explain shear pin model, Q. Explain Shear Pin Model? Shear Pin Model: I...

Q. Explain Shear Pin Model? Shear Pin Model: In this type, a shearing force is applied using a pin to shear the food Product. We are rupturing the element of the food product b

Define guidelines of school children and adolescents, Define Guidelines of ...

Define Guidelines of School Children and Adolescents? 1) Do not skip breakfast. At least have milk, fruit and cereal. Some children prefer to flavour the milk with cereal or pr

State the exocytosis in a skeletal muscle, Exocytosis in a skeletal muscle?...

Exocytosis in a skeletal muscle?   A.  During exocytosis in a skeletal muscle, there will be release of calcium ions from intracellular vesicles in the sarcoplasmic reticulum i

Inverse pcr, Inverse PCR is the variation of PCR which makes the amplifica...

Inverse PCR is the variation of PCR which makes the amplification of DNA segments of unknown sequence that flank DNA segments of the known sequence possible; in short, total DNA i

Is it necessary for blood to have less or more hemoglobin, Q. In high altit...

Q. In high altitudes is it necessary for the blood to have less or more hemoglobin? In high altitudes the oxygen concentration and air is rarefied is lower than in low altitude

Nucleus, NUCLEUS First described and christened by Robert brown 1831, a...

NUCLEUS First described and christened by Robert brown 1831, a nucleus is the largest and most important organelle of eukaryotic cells. It is membrane bound and generally locat

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