Structure of Atom questions
799 published questions with worked solutions.
- The number of electrons with the azimuthal quantum number l=1 and 2 for _ 24 Cr in its ground state are:
- An electron has principal quantum number 3. The number of its (i) subshells and (ii) orbitals would be respectively:
- Correct set of four quantum numbers of a 4d-electron is:
- If the electron in the hydrogen atom is excited to n=5, the number of different frequencies of radiations which may be emitted is:
- Which electron transition in a hydrogen atom requires the largest amount of energy?
- Atomic radius is of the order of 10^ -8 cm and the nuclear radius is of the order of 10^ -13 cm . The fraction of the atom...
- Which set of quantum numbers represents the electron of the lowest energy?
- The ratio between kinetic energy and the total energy of the electron of a hydrogen atom according to Bohr's model is:
- The energy of an electron in the first orbit of He^+ is (R_H=-871.6 10^ -20 J ). The energy of the electron in the first orbit of...
- How many electrons can be accommodated in a subshell for which n=3, l=1?
- Which of the following is not a permissible arrangement of electrons in an atom?
- The radius of Bohr's first orbit in the H-atom is 0.053 nm. The radius of the second orbit in He^+ would be:
- The quantum numbers for the last electron in an atom are n=3,l=1 and m=-1. The atom is:
- The value of Planck's constant is 6.63 10^ -34 J s . The velocity of light is 3.0 10^8 m s ^ -1 . Which value is closest to the...
- The uncertainty principle and the concept of the wave nature of matter were proposed by ... and ... respectively.
- The principal quantum number of an atom represents:
- The total number of orbitals in a shell with principal quantum number n is:
- The total number of atomic orbitals in the fourth energy level of an atom is:
- The first emission line of the Balmer series for the H-spectrum has the wave number equal to:
- Which of the following sets of quantum numbers is correct for an electron in a 4f-orbital?
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