The fact that electrons occupy certain specified energy levels in which they are radiation less solves the problems associated with the Rutherford model.
<h3>What is the Bohr-Sommerfeld Model?</h3>
According to the Bohr-Sommerfeld Model of the atom, the electrons in an atom tend to occupy certain specified energy levels in which they are radiation less.
Recall that following from the Rutherford model and the and the Maxwell's laws, an accelerating charge radiates energy. Thus, the bottle neck is removed by assuming that electrons occupy specific energy levels in which they do not move about an loose energy.
This eliminates the possibility that the electron could spiral into the nucleus.
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chromosomes.
Explanation:
Chromosomes occur as strands of long-chain protein molecules called DNA. Chromosomes are made up of two strands each called chromatid . The chromatids are joined at a point called centromere. During prophase, the chromosomes become tightly coiled and so appear shorter and thicker. Parts of chromosomes form functional units called genes which determine different activities of the cell. Genes are hereditary and can be transmitted from parent to off-spring.
<span>Growth harmones are released from pitutary gland in to the blood stream. This harmone promotes growth in children till they grow upto 15-18 years. Then this harmone stops. The excess secretion of this harmone leads to over height that is Gigantism. the dificiency of growth harmones are leads to shortness i.e. dwarfinism. The growth harmones secretes equally in both boys and girls. It secretes in hypothalamus of the brain</span>
