Atomic Structure Questions

Bohrs theory is not applicable to;

The magnetic quantum number for the last electron in sodium is;

The ratio of minimum to maximum wavelengths in Balmer series of H-atom is;

Which one of the following sets of ions represents the collection of isoelectronic species? (Atomic no. F = 9, Cl = 17, Na = 11, Mg = 12, Al = 13, K = 19, Ca = 20 Sc = 21).

The number of protons, neutrons and electrons in 71Lu175 respectively, are;

Given below are two statements: Statement I: In fourth energy level there is no f subshell. Statement II: For n = 3, the possible value of l are 0,1 and 2. In the light of the above statements, choose the most appropriate answer from the options give

Given below are two statements: Statement I: The de Broglie equation suggests that an electron has particle-wave duality. Statement II: If the uncertainty in position of a moving particle is 0, then Δp = Infinite. In the light of the above statements

Which experiment is responsible for finding out the charge on an electron?

The ratio of spacing between the third and fourth orbit to the spacing between sixth and seventh orbit of H-atom is

The threshold frequency for a metal is 7.0 × 1014 s-1. Calculate the kinetic energy of an electron emitted when radiation of frequency 1.0 × 1015 s-1 hits the metal.

Which of the following configuration is violating Pauli’s exclusion principle?

A hydrogen-like ion produces a spectral line with one-fourth the wavelength of a corresponding line in hydrogen for the same electronic transition. Identify the species.

Which of the following statements is incorrect?

Which of the following properties of atom could be explained correctly by Thomson model of atom?

Given below are two statements: Statement I: Orbital having xz plane as node may be 3dxy. Statement II: 3dxy has zero radial node. In the light of the above statements, choose the most appropriate answer from the options given below:

Maximum number of angular nodes are present in

Which one is the wrong statement?

Which of the following quantum numbers is not possible?

Which of the following is the correct order of energy of orbitals?

The quantum number which decides the orientation of an orbital in space is:

Which of the following statement is correct regarding Heisenberg’s uncertainty principle?

The wavelength of light associated with a photon of energy 3.3 × 10-19 J is:

The number of orbitals in a subshell having azimuthal quantum number l = 3 is:

Which of the following statements is correct?

The number of angular nodes for 4f orbital is:

Match List-I with List-II: List-I List-II (A) Number of electrons in an orbit (I) 0.529 × n²/Z Å (B) Bohr’s radius of an orbit (II) 2n² (C) Angular momentum of an electron (III) h/mv (D) de Broglie wavelength (IV) nh/2π Choose the correct answer from

Number of radial/spherical nodes present in 5f orbital is:

The ratio of minimum to maximum wavelengths in Balmer series of H-atom is:

Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Threshold frequency is the maximum frequency required for the ejection of electron from the metal surface. Reason (R): Threshold

A ball of mass 200 g is moving with a velocity of 10 m s-1. If the error in measurement of velocity is 0.1%, the minimum uncertainty in its position is:

Which of the following is/are not correct with respect to energy of atomic orbitals of hydrogen atom? (A) 1s < 2p < 3d < 4s (B) 1s < 2s = 2p < 3s = 3p (C) 1s < 2s < 2p < 3s < 3p (D) 1s < 2s < 4s < 3d Choose the correct answer from the options given b

The radiations having minimum wavelength among the following is:

Consider the ground state of Cr atom (Z = 24). The numbers of electrons with the azimuthal quantum numbers, l = 1 and 2 are, respectively

If the radius of the first Bohr orbit of the H atom is ‘x Å’, then the radius (in Å) of the first orbit of He⁺ ion will be:

Which of the following statements does not form part of Bohr's model of the hydrogen atom

Given below are two statements: Statement I: Bohr’s theory accounts for the stability and line spectrum of Li⁺ ion. Statement II: Bohr’s theory was unable to explain the splitting of spectral lines in the presence of a magnetic field. In the light of

From the α-particle scattering experiment, Rutherford concluded that:

Which of the following groupings represent a collection of isoelectronic species ?

Match List-I with List-II. List-I List-II (A) n = 3, l = 0 (I) 3p orbital (B) n = 4, l = 2 (II) 4s orbital (C) n = 4, l = 0 (III) 3s orbital (D) n = 3, l = 1 (IV) 4d orbital Choose the correct answer from the options given below:

Which of the following sets of quantum number is incorrect? I. n = 5, l = 4, m = 0, s = +1/2 II. n = 3, l = 3, m = +3, s = +1/2 III. n = 6, l = 0, m = +1, s = –1/2 IV. n = 4, l = 2, m = +2, s = 0

Which of the following statements is incorrect for anode rays?

In the ground state, an element has 13 electrons in its M shell. The element is

The energy of an electron moving in nth Bohr’s orbit of an element is given by En = –13.6Z²/n² eV/atom. The graph of E vs Z² (keeping “n” constant) will be;

The basis of three unpaired electrons present in the configuration of nitrogen is

The energies E1 and E2 of two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths i.e., λ1 and λ2 will be:

Read the following statements and choose the correct option: (I) If the radius of the first Bohr orbit of hydrogen atom is r, then radius of 2nd orbit of Li2+ would be 4r. (II) For s-orbital, the orbital angular momentum is zero.

Maximum number of electrons in a subshell with l = 3 and n = 4 is:

Given below are two statements: Statement I: Kinetic energy of photoelectrons depend upon frequency. Statement II: The e/m ratio of electron is less than proton. In the light of the above statements, choose the most appropriate answer from the option

The maximum number of 4d electrons having spin quantum number +1/2 are

Select the incorrect statement(s):