List of top Chemistry Questions on Atomic Structure

First ionisation potential energy of Li(m) is 520 kJ/mol$^{-1}$, hence calculate the energy required to convert Li-atoms present in 70 mg Li(m) into Li$^+$ ion.
The ratio of ground state energy of \( \text{Li}^{2+}, \text{He}^{+}, \text{H} \) is:
Number of spectral lines obtained in He+ spectra, when an electron makes transition from fifth excited state to first excited state will be __________.
Which of the following electronic configurations would be associated with the highest magnetic moment?
The number of electrons present in all the completely filled subshells having n=4 and s=+½​ is _____. (Where n = principal quantum number and s = spin quantum number).
The correct set of four quantum numbers for the valence electron of rubidium atom (Z = 37) is:
Choose the correct option having all the elements with \( d^{10} \) electronic configuration from the following:
The four quantum numbers for the electron in the outer most orbital of potassium (atomic no. 19) are
In an atom, total number of electrons having quantum numbers n = 4, $|m_l|$ = 1 and $m_s$ = $-\frac{1}{2}$ is ________.
The number of radial node/s for 3p orbital is:
What is the energy (in J) required to transfer the electron from \( n = 1 \) to \( n = 2 \) state in \( \text{Li}^{2+} \)? (K = constant \( 2.18 \times 10^{-18} \) J)

Match the following:

ElementList - IIAtomic Radius (in pm)
A. NaI.152
B. LiII.99
C. ClIII.64
D. FIV.186

Two statements are given below: Statement I: In H atom, the energy of 2s and 2p orbitals is the same. 
Statement II: In He atom, the energy of 2s and 2p orbitals is the same. 

The set containing the elements with positive electron gain enthalpies is?

Assertion (A): The ionic radii of \( Na^+ \) and \( F^- \) are the same. 
Reason (R): Both \( Na^+ \) and \( F^- \) are isoelectronic species. 

Match List I with List II:
LIST ILIST II
A. Energy of ground state of HeI. \( +6.04 \, \text{eV} \)
B. Potential energy of I orbit of H-atomII. \( -27.2 \, \text{eV} \)
C. Kinetic Energy of II excited state of HeIII. \( 54.4 \, \text{eV} \)
D. Ionization potential of HeIV. \( -54.4 \, \text{eV} \)
Choose the correct answer from the options given below:
Which of the following regarding the shapes of d-orbitals is not correct?
The magnitude of angular momentum of an electron occupying 3s atomic orbital is
The probability of finding the electron in the px orbital is
(A). Zero at the nucleus
(B). Maximum on two opposite sides of the nucleus along the X-axis
(C). Zero on the Z-axis
(D). Same on all sides around the nucleus
Choose the correct answer from the options given below:
Electromagnetic radiation has electric and magnetic field components. These two components:
The wavenumbers of the first three emission lines of Lyman series of hydrogen spectrum are respectively \( \nu_1, \nu_2, \nu_3 \). Similarly, the wavenumbers of first three emission lines of Balmer series of hydrogen spectrum are \( \nu_4, \nu_5, \nu_6 \), respectively. Identify the correct relationship:
Explain effective atomic number (EAN) by an example.
The velocity constants of a reaction are 0.02 s\(^{-1}\) and 0.07 s\(^{-1}\) at 500 K and 700 K, respectively. Calculate the value of \( E_a \).
Frequency of the de-Broglie wave of the electron in Bohr's first orbit of the hydrogen atom is ______ \( \times 10^{13} \, \text{Hz} \) (nearest integer).
Given:\(R_H\) (Rydberg constant) = \(2.18 \times 10^{-18} \, \text{J}\)\(h\) \((\)Planck's constant)= \(6.6 \times 10^{-34}\)\(\text{J.s}\)
The number of different chain isomers for \( \text{C}_7\text{H}_{16} \) is ______.