Samacheer Kalvi solutions for Chemistry - Volume 1 and 2 [English] Class 11 TN Board chapter 2 - Quantum Mechanical Model of Atom [Latest edition]

Electronic configuration of species M²⁺ is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶ and its atomic weight is 56. The number of neutrons in the nucleus of species M is

The energy of light of wavelength 45 nm is

The energies E₁ and E₂ of the two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths ie λ₁ and λ₂ will be

Splitting of spectral lines in an electric field is called __________.

Based on equation E = `-2.178 xx 10^(-18) "J" ("z"^2/"n"^2)`, certain conclusions are written. Which of them is not correct?

According to the Bohr Theory, which of the following transitions in the hydrogen atom will give rise to the least energetic photon?

Assertion: The spectrum of He⁺ is expected to be similar to that of hydrogen.

Reason: He⁺ is also one electron system.

Which of the following pairs of d-orbitals will have electron density along the axes?

Two electrons occupying the same orbital are distinguished by __________.

The electronic configuration of Eu (Atomic no. 63) Gd (Atomic no. 64) and Tb (Atomic no. 65) are

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

For d-electron, the orbital angular momentum is

What is the maximum numbers of electrons that can be associated with the following set of quantum numbers?

n = 3, l = 1 and m = –1

Assertion: Number of radial and angular nodes for 3p orbital are 1, 1 respectively.

Reason: Number of radial and angular nodes depends only on principal quantum number.

The total number of orbitals associated with the principal quantum number n = 3 is

If n = 6, the correct sequence for filling of electrons will be,

Consider the following sets of quantum numbers:

Which of the following sets of quantum number is not possible?

How many electrons in an atom with atomic number 105 can have (n + 1) = 8?

Electron density in the yz plane of 3d_xy orbital is

If uncertainty in position and momentum are equal, then minimum uncertainty in velocity is

A macroscopic particle of mass 100 g and moving at a velocity of 100 cm s^–1 will have a de Broglie wavelength of

The ratio of de Broglie wavelengths of a deuterium atom to that of an α - particle, when the velocity of the former is five times greater than that of later, is

The energy of an electron in the 3rd orbit of hydrogen atom is –E. The energy of an electron in the first orbit will be

Time independent Schrodinger wave equation is

Which of the following does not represent the mathematical expression for the Heisenberg uncertainty principle?

Which quantum number reveal information about the shape, energy, orientation and size of orbitals?

How many orbitals are possible for n = 4?

How many radial nodes for 2s, 4p, 5d and 4f orbitals exhibit? How many angular nodes?

The stabilisation of a half-filled d-orbital is more pronounced than that of the p-orbital why?

Consider the following electronic arrangements for the d⁵ configuration.

1. which of these represents the ground state.
2. which configuration has the maximum exchange energy.

State and explain Pauli's exclusion principle.

Define orbital?

what are the n and l values for 3p_x and `"4d"_("x"^2 - "y"^2)` electron?

Explain briefly the time independent Schrodinger wave equation?

Calculate the uncertainty in position of an electron, if Δv = 0.1% and υ = 2.2 × 10⁶ ms^-1

Determine the values of all the four quantum numbers of the 8^th electron in the O-atom and 15^th electron in Cl atom.

The quantum mechanical treatment of the hydrogen atom gives the energy value:

E_n = `(-13.6)/"n"^2` ev atom⁻¹

1. use this expression to find ΔE between n = 3 and n = 4
2. Calculate the wavelength corresponding to the above transition.

How fast must a 54 g tennis ball travel in order to have a de Broglie wavelength that is equal to that of a photon of green light 5400 Å?

For each of the following, give the sub level designation, the allowable m values and the number of orbitals

1. n = 4, l = 2
2. n = 5, l = 3
3. n = 7, l = 0

Give the electronic configuration of Mn²⁺ and Cr³⁺

Describe the Aufbau principle.

An atom of an element contains 35 electrons and 45 neutrons. Deduce

1. the number of protons
2. the electronic configuration for the element
3. All the four quantum numbers for the last electron

Show that the circumference of the Bohr orbit for the hydrogen atom is an integral multiple of the de Broglie wavelength associated with the electron revolving around the nucleus.

Calculate the energy required for the process.

\[\ce{He^+_{(g)} -> He^2+_{(g)} + e^-}\]

The ionisation energy for the H atom in its ground state is −13.6 ev atom⁻¹.

An ion with mass number 37 possesses unit negative charge. If the ion contains 11.1% more neutrons than electrons. Find the symbol of the ion.

The Li²⁺ ion is a hydrogen like ion that can be described by the Bohr model. Calculate the Bohr radius of the third orbit and calculate the energy of an electron in 4^th orbit.

Protons can be accelerated in particle accelerators. Calculate the wavelength (in Å) of such accelerated proton moving at 2.85 × 10⁸ ms⁻¹ (the mass of proton is 1.673 × 10⁻²⁷ Kg).

What is the de Broglie wavelength (in cm) of a 160 g cricket ball travelling at 140 Km hr⁻¹?

Suppose that the uncertainty in determining the position of an electron in an orbit is 0.6 Å. What is the uncertainty in its momentum?

Show that if the measurement of the uncertainty in the location of the particle is equal to its de Broglie wavelength, the minimum uncertainty in its velocity (ΔV) is equal to 1/4π of its velocity (V).

What is the de Broglie wavelength of an electron, which is accelerated from the rest, through a potential difference of 100V?

Identify the missing quantum numbers and the sub energy level