Login / Register

List of top Chemistry Questions on Atomic Structure

The ratio of the wavelengths of the light absorbed by a Hydrogen atom when it undergoes n = 2 $\rightarrow$ n = 3 and n = 4 $\rightarrow$ n = 6 transitions, respectively, is:
Energy and radius of first Bohr orbit of He$^+$ and Li$^2+$ are:
Given: $ R_H = 2.18 \times 10^{-18} \, \text{J}, a_0 = 52.9 \, \text{pm} $
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)$?
What is the molecular mass of \( \text{K}_2\text{SO}_4 \)?
Which hydrogen-like species will have the same radius as the 1st Bohr orbit of a hydrogen atom?
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.\\
The decreasing order of atomic radii (pm) of \( \text{Li}, \, \text{Be}, \, \text{B}, \, \text{C} \) is:
The wavelength (in cm) of the second line in the Lyman series of the hydrogen atomic spectrum is (Rydberg constant \( R \, \text{cm}^{-1})\).