uses of isotopes atoms

An atomic orbital is the space around the nucleus in which the probability of finding the electron is maximum. These most probable regions can be diagrammatically represented by cloud density (dot) diagrams. The density of dots (or lack of them) in any region of the cloud diagram, i..

Shapes of Atomic Orbitals - An atomic orbital is the space around the nucleus in which the probability of finding the electron is maximum. These most probable regions can be diagrammatically represented by cloud density (dot) diagrams. The density of dots (or lack of them) in an..

When the atomic vapours from a sample are placed in the path of white light from an arc lamp, it absorbs the light of certain characteristic wavelengths and the light of other wavelengths get transmitted. In such conditions a series of dark lines on a white background are formed. This is..

. But when an electron jumps from a lower energy level to a higher one, some energy is absorbed while some energy is emitted. When an electron jumps from a higher energy level to a lower one, the amount of energy absorbed or emitted is given by the difference of energies associated with the two lev..

m)C 2 Nuclear fission is the phenomenon of splitting a heavy nucleus into two or more smaller nuclei. Mass defect in this process appears in the form of energy. The fission 92 U 235 by thermions is neutron as: The Q value of the reaction is 200 MeV. Under suitable conditions, the th..

The mass of 1/12 part of 12 C isotope of carbon is equivalent to one atomic mass uni..

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 ..

. Lyman series from n = 2, 3, 4, 5to n = 1 Balmer series from n = 3, 4, 5, 6to n = 2 Paschen series from n = 4, 5, 6, 7to n = 3 Brackett series from n = 5, 6, 7, 8to n = 4 Pfund series from n = 6, 7, 8, 9to n = 5. The energy of the electron in a particular orbit of hydrogen atom could be ..

An atom is a very minute particle and so the actual mass of an atom is extremely small. It is physically not possible to measure such small masses easily. In 1811, Avogadro suggested that atomic and molecular masses can be expressed on an atomic mass scale r..

. In this case, the electron probability densities of two atomic orbitals get cancelled in the centre (by subtraction) so that there is no probability of finding the electron in the region of overlap or between the nuclei. This situation does not favor the bond formation. Such an orbital ..