NEET Chemistry Structure of Atom Class 11 Questions

Taking the Bohr radius as a₀ = 53 pm, the radius of Li⁺⁺ ion in its ground state, on the basis of Bohr’s model, will be about

What is the ratio of the shortest wavelength of the Balmer series to the shortest wavelength of the Lyman series?

Choose the correct option from the following options given below:

(1) In the ground state of Rutherford's model electrons are in stable equilibrium. While in Thomson's model electrons always experience a net-force.

(2) An atom has a nearly continuous mass distribution in a Rutherford's model but has a highly non-uniform mass distribution in Thomson's model.

(3) A classical atom based on Rutherford's model is doomed to collapse.

(4) The positively charged part of the atom possesses most of the mass in Rutherford's model but not in Thomson's model.

Hydrogen atom from excited state comes to the ground by emitting a photon of wavelength $\lambda$. The value of principal quantum number 'n' of the excited state will be : (R : Rydberg constant)

The angular momentum of an electron moving in an orbit of hydrogen atom is 1.5 ℏ/π. The energy in the same orbit is nearly.

Which of the following quantum numbers are correct for the outermost electron of sodium atom?

How many nodal planes are there in the atomic orbitals for the principal quantum number n = 3?

For the electrons of oxygen atom, which of the following statements is correct?

Two electrons present in M shell will differ in

A certain orbital has no angular nodes and two radial nodes. The orbital is

How many nodal planes are there in the atomic orbitals for the principal quantum number n = 3?

The electronic states X and Y of an atom are depicted below: X : 1s²2s²2p⁶3s¹ Y : 1s²2s²2p⁶3s²3p⁶4s¹ Which of the following statements is not correct?

Which of the following sets of quantum numbers represents the highest energy of an atom?

Identify the incorrect statement. The findings from the Bohr model for H⁻atom are

The number of radial nodes and angular nodes for d-orbital can be represented as

Which of the following sets of quantum numbers represents the highest energy of an atom?

Number of angular nodes for 4d orbital is ............ .

The maximum number of electrons in a subshell is given by the expression

Which of the following statements is not correct?

The radius of hydrogen atom in ground state is 0.53 Å. What will be the radius of Li²⁺ in the ground state?

If radius of second Bohr orbit of the He⁺ ion is 105.8 pm, what is the radius of third Bohr orbit of Li²⁺ ion?

Which orbital has the lowest energy among the following?

What does the square of the orbital wave function |ψ|² represent in an atom?

What does the probability density (|ψ|²) represent in an atom?

What is the order of energy levels for orbitals in a multi-electron atom?

Which of the following quantum numbers can have the value l = 3?

What does the probability density |ψ|² at any point in an atom represent?

What is the term used to describe the probability of finding an electron at a point within an atom, which is proportional to the square of the orbital wave function?

Who proposed that an atom consists of a uniform sphere of positive electricity with electrons embedded within it?

What are the three quantum numbers that arise from the solution of the Schrödinger equation?

What does the principal quantum number 'n' primarily determine in an atomic orbital?

Which atomic model proposed by J.J. Thomson describes the atom as having a spherical shape with uniformly distributed positive charge?

Which of the following orbitals contains the highest effective nuclear charge for an electron?

Which of the following transitions in a hydrogen atom corresponds to the emission of a photon with a frequency of 6.91 × 10^14 Hz?

What does the probability density |ψ|² represent at any point in an atom?

Which of the following statements about atomic models is correct?

Which of the following statements about electron distribution in orbitals is correct?

Which of the following combinations correctly describes the characteristics of positively charged particles discovered in cathode ray tubes?

Which of the following statements about orbitals and quantum numbers is correct?

Which of the following statements about electromagnetic waves and photon behavior is correct?

Which of the following combinations of statements about isotopes and their properties is correct?

Which of the following combinations correctly describes aspects of atomic structure and the behavior of light?

Which of the following statements about the characteristics of positively charged particles discovered in canal rays is correct?

Assertion (A): Thomson proposed that the atom consists of a uniform sphere of positive electricity with electrons embedded in it.

Reason (R): Rutherford's alpha-particle scattering experiment proved that the mass of the atom is concentrated in a small nucleus.

Assertion (A): The wavenumber is commonly expressed in cm⁻¹.

Reason (R): Wavenumber is defined as the number of wavelengths per unit length.

Assertion (A): The line spectrum of an element is unique.

Reason (R): The energies of electrons in different orbitals depend on the values of n and l.

Assertion (A): The photoelectric effect can be observed even with low intensity yellow light on potassium metal.

Reason (R): The energy of emitted photoelectrons depends on the frequency of incident light, not its intensity.

Assertion (A): In a 2s orbital, the probability density first decreases to zero and then increases again to a small maximum before decreasing.

Reason (R): The square of the wave function gives the probability density of the electron at a point.

Assertion (A): The order of filling of orbitals in an atom follows the sequence: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p.

Reason (R): The energy of a given orbital depends upon the effective nuclear charge and is the same for all atoms.

Assertion (A): The energy of an electron in an s orbital is more negative than that in a p orbital of the same shell.

Reason (R): The s orbital electron is more tightly bound to the nucleus than a p orbital electron due to its spherical shape.