Atomic Structure · Chemistry · COMEDK

What is the wave number (Units $$\mathrm{cm}^{-1}$$) of the longest wave length transition in the Balmer series of Hydrogen spectrum? $$Z=1 \text { fo...

What are the Principal & Azimuthal quantum number values of the valence electrons in tripositive Lutetium?

A statement of Assertion followed by a statement of Reason is given. Choose the correct answer out of the following options. Assertion : Energy of $$2...

Given below are 4 subatomic particles travelling with the same velocity "v". Which of them will have the shortest wavelength? $$[A]=\text { Proton }[B...

The mass number of an element $$\mathrm{X}$$ is 175 with 104 neutrons in its nucleus. Into which one of the following orbitals will the last electron ...

Bohr's radius of 2 nd orbit of $$\mathrm{Be}^{3+}$$ is equal to that of

The ion that is isoelectronic with $$\mathrm{CO}$$ is

A proton having mass equal to $$1.66 \times 10^{-27} \mathrm{~kg}$$ is accelerated to one tenth of the velocity of light. If its velocity can be measu...

The energy of an electron in the ground state of Hydrogen atom is $$-2.18 \times 10^{-18} \mathrm{~J}$$. What would be the energy associated with the ...

Minimum number of nodes are present in

$$\mathrm{O^{2-},F^-,Mg^{2+},Al^{3+},O_2,F_2}$$. How many of the species given above isoelectronic?

The spectrum of He$$^+$$ is similar to

The Paschen series of hydrogen spectrum lies in which region?

The total number of nodes are given by

Which of the following series of transitions in the spectrum of hydrogen atom fall in visible region?

The Lyman series of hydrogen spectrum lies in which region

A body of mass 10 mg is moving with a velocity of 100 ms$$^{-1}$$. The wavelength of de-Broglie wave associated with it would be ($$h=6.63\times10^{-3...

Mg$$^{2+}$$ is isoelectronic with