List of top Chemistry Questions on Atomic Structure

The correct order of radii is:
Which has the highest $e/m$ ratio?
Which has the highest weight?
The vapour density of ozone is
Chloride ion and potassium ion are isoelectronic. Then
Which of the following pairs has both members from the same period of the periodic table
In the periodic table, with the increase in atomic number, the metallic character of an element
A radioactive element \(X\) emits \(3\alpha\), \(1\beta\) and \(1\gamma\)-particles and forms \({}^{76}_{35}Y\). Element \(X\) is
The activity of an old piece of wood is just \(25%\) of the fresh piece of wood. If \(t_{1/2}\) of \(C\text{-}14\) is \(6000\,yr\), the age of piece of wood is
0.1 m$^{3}$ of water at $80^{\circ}C$ is mixed with 0.3 m$^{3}$ of water at $60^{\circ}C$. The final temperature of the mixture is
An aqueous solution containing 6.5 g of NaCl of 90% purity was subjected to electrolysis. After the complete electrolysis, the solution was evaporated to get solid NaOH. The volume of 1 M acetic acid required to neutralise NaOH obtained above is
Near a circular loop of conducting wire as shown in the figure an electron moves along a straight line. The direction of the induced current if any in the loop is
In the following combinations of logic gates, the outputs of A, B and C are respectively
The resistance of an ideal ammeter is:
The amount of energy released when one microgram of matter is annihilated is
The wave velocities of electron waves in two orbits is \(a:5\). The ratio of kinetic energy of electrons is
Electrons with a kinetic energy of \(6.023 \times 10^{-19}\,J\) are evolved from the surface of a metal, when it is exposed to a radiation of wavelength of \(600\,nm\). The minimum amount of energy required to remove an electron from the metal atom is
Dipole moment of HCl = \(1.03\,D\), HI = \(0.38\,D\). Bond length of HCl = \(1.3\,\AA\) and HI = \(1.6\,\AA\). The ratio of fraction of electric charge \(\delta\) existing on each atom in HCl and HI is
\(1.5g\) of \(CdCl_2\) was found to contain \(0.9g\) of Cd. Calculate the atomic weight of Cd.
The electronic configuration \( 1s^{2}\, 2s^{2}\, 2p^{6}\, 3s^{2}\, 3p^{6}\, 3d^{10} \) represents:
Which of the following has highest second ionisation energy?
Which of the following has highest second ionisation energy?
The presence of unpaired electron in phosphorous atom is explained by which principle?
Which of the following is correct, based on molecular orbital theory for peroxide ion?
Which of the following is correct, based on molecular orbital theory for peroxide ion?