List of top Chemistry Questions on Atomic Structure

Consider the ground state of an atom (Z = 24). How many electrons are arranged with Azimuthal quantum number $ l = 1 $ and $ l = 2 $ respectively?
What is the molecular mass of \( \text{K}_2\text{SO}_4 \)?
What is the molecular mass of $ \text{Na}_2\text{SO}_4 $?
Which of the following is the correct electron configuration for an oxygen atom?
What is the molar mass of sulfur dioxide (SO$_2)$?

Correct statements for an element with atomic number 9 are 
A. There can be 5 electrons for which $ m_s = +\frac{1}{2} $ and 4 electrons for which $ m_s = -\frac{1}{2} $ 
B. There is only one electron in $ p_z $ orbital. 
C. The last electron goes to orbital with $ n = 2 $ and $ l = 1 $. 
D. The sum of angular nodes of all the atomic orbitals is 1. 
Choose the correct answer from the options given below:

The energy of an electron in first Bohr orbit of H-atom is $-13.6$ eV. The magnitude of energy value of electron in the first excited state of Be$^{3+}$ is _____ eV (nearest integer value)

What is the number of radial nodes for a 4f orbital?
What is the effective nuclear charge (Z_eff) of Copper (Cu)?
Which among the following pairs are not having the same number of total electrons?
The correct increasing order of energy of orbitals in a hydrogen atom is:
The sum of number of angular nodes and radial nodes for 4d orbital is:
The difference in radii between fourth and third Bohr orbits of \( He^+ \) (in m) is:
Consider the argon atom. For how many electrons does this atom have \( m_l = 1 \)?
Which one of the following is the standard for atomic mass?
The number of neutrons in \(^{238}U\) is
The correct order of Radii is
The wavelength (in cm) of the second line in the Lyman series of the hydrogen atomic spectrum is (Rydberg constant \( R \, \text{cm}^{-1})\).
Which one of the following atoms is smaller in size?
Number of unpaired electrons present in carbon atom is
Consider an electron moving in the first Bohr orbit of a He\(^+\) ion with velocity \(v_1\). If it is allowed to move in the third Bohr orbit with velocity \(v_3\), determine the correct \(v_3 : v_1\) ratio.\\
Which hydrogen-like species will have the same radius as the 1st Bohr orbit of a hydrogen atom?
The decreasing order of atomic radii (pm) of \( \text{Li}, \, \text{Be}, \, \text{B}, \, \text{C} \) is:
If energy of an electron in the first orbit is -13.6 eV, then predict the amount of energy required to transfer it to the fourth orbit.
Metal oxides of A(m) and B(m) are structurally similar. Atomic weight of A is 52 and vapor density of its chloride is 79. Oxide of B contains 47.1% oxygen. Considering the above data, calculate the atomic weight of B (in nearest whole number).