three nuclei

Bohr improved upon Rutherford model postulating that electrons can revolve around the nucleus in certain discrete, non-radiating orbits, called stationary orbits, for which total angular momentum of revolving electron is an integral multiple of h / 2 p where h is Planck's constant. Where n = 1,2,..

02. - Determine the radius of the first orbit of the hydrogen atom. What would be the velocity and frequency of the electron in the first orbit? Given: h = 6.62 x 10 - 3 4 Js, m = 9.1 x 10 - 3 1 kg, e = 1.6 x 10 - 1 9 C, k = 9 x 10 9 N m 2 C - 2..

12. - The half-life of 92 U 238 against alpha decay is 4.5 x 109 years. How many disintegrations per second occur in 1 g of 92 U 238 ? Suggested solution: Again, since one k mole of any isotope contains Avogadro's number of atoms, there fore 1 g of 92 U 238 contains Half life T = 4.5 10 9 years Aga..

These have a granular cytoplasm and lobed nucleus. These are of 3 types on the basis of the shapes of their nuclei and the staining reactions of their granul..

(i) The average binding energy/nucleon for light nuclei like 1 H 1 , 1 H 2 , 1 H 3 is small. (ii) For mass numbers ranging from two to twenty, the sharply defined peaks correspond to nuclei, which are relatively more stable than the neighborhood nuclei. ..

Neutrons are considered as the best projectile particles to hit the target (uranium) nucleus. The uranium may absorb these neutrons and become 9 2 U 2 3 6 which later splits into two smaller nuclei. In addition two neutrons are released and energy is also released. Thi..

Neutrons and protons attract each other at distances of order of 10 - 1 5 m, and bind (come together) to form nuclei. The associated energy is called nuclear energy. For example, because of this attraction, a helium nucleus (consisting of two protons and two neutrons) has less energy t..

Natural uranium contains very little (0.72%) of its fissionable isotope 2 3 5 U needs to be enriched in the latter to be useful as a fuel in nuclear reactor. A breeder reactor is one that produces more fissionable nuclei than it consume..

Nuclear Fission - Neutrons are considered as the best projectile particles to hit the target (uranium) nucleus. The uranium may absorb these neutrons and become 9 2 U 2 3 6 which later splits into two smaller nuclei. In addition two neutrons are released and energy is also relea..

It is a spontaneous emission or disintegration of an unstable nucleus resulting in certain radiations. The elements exhibiting this phenomena are called radioactive elements. e.g., radium, thorium, actinium, polonium etc. Radioactivity does not occur due to any external provocation and is a propert..