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The number of atoms in 100g FCC crystal with density =10g/cm^3 and cell edge length is 200pm?
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The number of atoms in 100g FCC crystal with density =10g/cm^3 and cel...
Wese to 4 hote h ....but value se pucha to solve kr lo
d=z×M/NA×a^3
(NA=avogadhro value) sbhi value ko cm^3 me Lana pdega...(a= length)
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Read the following text and answer the following questions on the basis of the same:Band theory of solid:Consider that the Si or Ge crystal contains N atoms. Electrons of each atom will have discrete energies in different orbits. The electron energy will be same if all the atoms are isolated, i.e., separated from each other by a large distance. However, in a crystal, the atoms are close to each other (2 Å to 3 Å) and therefore the electrons interact with each other and also with the neighbouring atomic cores. The overlap (or interaction) will be more felt by the electrons in the outermost orbit while the inner orbit or core electron energies may remain unaffected. Therefore, for understanding electron energies in Si or Ge crystal, we need to consider the changes in the energies of the electrons in the outermost orbit only. For Si, the outermost orbit is the third orbit (n = 3), while for Ge it is the fourth orbit (n = 4). The number of electrons in the outermost orbit is 4 (2s and 2p electrons). Hence, the total number of outer electrons in the crystal is 4N. The maximum possible number of outer electrons in the orbit is 8 (2s + 6p electrons). So, out of the 4N electrons, 2N electrons are in the 2N s-states (orbital quantum number l = 0) and 2N electrons are in the available 6N p-states. Obviously, some p-electron states are empty. This is the case of well separated or isolated atoms.Q. For Silicon and Germanium the outermost orbits are respectively

The number of atoms in 100g FCC crystal with density =10g/cm^3 and cell edge length is 200pm?
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The number of atoms in 100g FCC crystal with density =10g/cm^3 and cell edge length is 200pm? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about The number of atoms in 100g FCC crystal with density =10g/cm^3 and cell edge length is 200pm? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The number of atoms in 100g FCC crystal with density =10g/cm^3 and cell edge length is 200pm?.
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