List of top Chemistry Questions on Quantum Mechanical Model of Atom

Which of the following quantum numbers determines the shape of an orbital?

Given below are two statements: 

In a multielectron atom, which of the following orbitals described by three quantum numbers will have the same energy in absence of electric and magnetic fields?
A. \( n = 1, l = 0, m_l = 0 \)
B. \( n = 2, l = 0, m_l = 0 \)
C. \( n = 2, l = 1, m_l = 1 \)
D. \( n = 3, l = 2, m_l = 1 \)
E. \( n = 3, l = 2, m_l = 0 \)
Choose the correct answer from the options given below:

Given below are two statements: 




In light of the above statements, choose the correct answer from the options given below:

The product (P) formed in the following reaction is:
 

In a multielectron atom, which of the following orbitals described by three quantum numbers will have the same energy in absence of electric and magnetic fields? 
A. \( n = 1, l = 0, m_l = 0 \) 
B. \( n = 2, l = 0, m_l = 0 \) 
C. \( n = 2, l = 1, m_l = 1 \) 
D. \( n = 3, l = 2, m_l = 1 \) 
E. \( n = 3, l = 2, m_l = 0 \) 

Choose the correct answer from the options given below:

The quantum numbers of four electrons are given below:
I. \( n = 4; l = 2; m_l = -2; s = -\frac{1}{2} \)
II. \( n = 3; l = 2; m_l = 1; s = +\frac{1}{2} \)
III. \( n = 4; l = 1; m_l = 0; s = +\frac{1}{2} \)
IV. \( n = 3; l = 1; m_l = -1; s = +\frac{1}{2} \)
The correct decreasing order of energy of these electrons is:
Which of the following sets of quantum numbers is not allowed?

Which of the following sets of quantum numbers is not allowed?

Which of the following sets of quantum numbers is not allowed?
Consider the following set of quantum numbers.
\(n \,|\, m_|\)
A. 3 3 –3
B. 3 2 –2
C. 2 1 +1
D. 2 2 +2
The number of correct sets of quantum numbers is _____.
An electron has magnetic quantum number ml = -3. What is its principal quantum number?
An electron has magnetic quantum number ml=-3. What is its principal quantum number?
The correct set of four quantum numbers for the valence electrons of rubidium atom $(Z = 37)$ is
Maximum number of orbitals possible when n = 4 and m = 0?
In an atom, how many electrons can have
(i) n = 4 (ii) m1 =1 (iii) ms = ½
How much energy is required to ionise a H atom if the electron occupies n = 5 orbit? Compare your answer with the ionization enthalpy of H atom (energy required to remove the electron from n = 1 orbit).
The electron energy in hydrogen atom is given by \(E_n = \frac {(–2.18×10^{–18})}{n^2} \ J\). Calculate the energy required to remove an electron completely from the n = 2 orbit. What is the longest wavelength of light in cm that can be used to cause this transition?
The mass of an electron is 9.1 × 10–31 kg. If its K.E. is 3.0 × 10–25 J, calculate its wavelength.
How many electrons in an atom may have the following quantum numbers?
  1. n = 4, ms = – \(\frac 12\)
  2. n = 3, l = 0
A certain particle carries 2.5 × 10–16 C of static electric charge. Calculate the number of electrons present in it.
  1. An atomic orbital has n = 3. What are the possible values of l and ml?
  2. List the quantum numbers (ml and l) of electrons for 3d orbital.
  3. Which of the following orbitals are possible?
    1p, 2s, 2p and 3f