List of top Chemistry Questions on Structure of atom

Energy of orbit X of Li$^{2+}$ is $-2.18\times10^{-18}$ J. Find radius of same orbit (in Å).}
The ratio of wavenumber of first line of Balmer series and wavenumber of second line of Lyman series of hydrogen atom is:
The energy of the second bohr orbit of the hydrogen atom is $-328 \text{ kJ mol}^{-1}$; hence the energy of the fourth bohr orbit would be:
What are the total number of electrons present in s and p orbitals respectively in the argon?
Match List I with List II
List I
Element		List II
Number of Neutron
(A). \(_{12}^{24}Mg\)(I). \(5\)
(B). \(_{13}^{27}Al\)(II). \(12\)
(C). \(_4^9Be\)(III). \(6\)
(D). \(_6^{12}C\)(IV). \(14\)
Choose the correct answer from the options given below:
The work functions of three metals \(A\), \(B\) and \(C\) are respectively \(2.25\), \(2.42\) and \(3.6\) eV. All the three metals are irradiated with light of wavelength \(330\) nm. The kinetic energies of photoelectrons emitted from \(A\), \(B\) and \(C\) are respectively \(E_A\), \(E_B\) and \(E_C\). The correct relationship among \(E_A\), \(E_B\) and \(E_C\) is \[ (h=6.6\times10^{-34}\ \mathrm{Js},\; c=3\times10^8\ \mathrm{ms^{-1}}) \]
The increasing order of \(2s\)-orbital's of the following atoms with respect to energy is \[ H,\; K,\; Li,\; Na \]
The statement that is NOT correct is:
An odd electron molecule among the following is (2015)
In the atomic spectrum of hydrogen, the wavelengths of the spectral lines corresponding to electronic transitions (i) n = 4 to n = 2 and (ii) n = 3 to n = 1 are $\lambda_1$ and $\lambda_2$ \AA{}respectively. The value of $(\lambda_1 - \lambda_2)$ (in cm) is ($R_H$ = Rydberg constant)
The energy associated with electron in first orbit of hydrogen atom is \(-2.18 \times 10^{-18}\) J. The frequency of the light required (in Hz) to excite the electron to fifth orbit is (\(h=6.6 \times 10^{-34}\) Js)
Observe the following statements
Statement-I: Rutherford model of an atom cannot explain the stability of an atom
Statement-II: The wavelength of X-rays is higher than the wavelength of microwaves
The correct answer is
What is the total number of orbitals associated with the principal quantum number $n=3$? ________.
For any sub-shell defined by '$l$' value how many values of magnetic quantum number ($m_l$) are possible? ________.
What is the wavenumber of the photon emitted during transition from the orbit $\text{n} = 5$ to that of $\text{n} = 2$ in hydrogen atom? $[ \text{R}_\text{H} = 109677\text{ cm}^{-1} ]$}
What is the wavenumber of the photon emitted during transition from the orbit $\text{n} = 5$ to that of $\text{n} = 2$ in hydrogen atom? $[ \text{R}_\text{H} = 109677\text{ cm}^{-1} ]$}
Consider the last electron of an element having atomic number $9$ and choose the correct option.
Wavenumber for a radiation having $5800 \, \mathring{A}$ wavelength is $x \times 10 \, \text{cm}^{-1}$. The value of $x$ is _________
In case of isoelectronic species the size of \(F^-\), \(Na\) and \(Na^+\) is affected by:

Select the correct statements from the following : 

A. Atoms of all elements are composed of two fundamental particles.
B. The mass of the electron is 9.10939 x 10-31 kg. 
C. All the isotopes of a given element same chemical properties. 
D. Protons and electrons are collected known as nucleons. 
E. Dalton’s atomic theory, regarded atom as an ultimate particle of matter.
Choose the correct answer from the options given below :

Which transition in the hydrogen spectrum would have the same wavelength as the Balmer type transition from $n =4$ to $n =2$ of $He ^{+}$spectrum

Given below are two statements: one is labeled as Assertion (A) and the other is labeled as Reason (R).
Statement-1: According to Bohr’s Model, angular momentum is Quantized for stationary orbits.
Statement-2: Bohr’s Model doesn’t follow Heisenberg’s Uncertainty Principle.
In the light of the above statements, write the detailed answer:

Arrange the following orbitals in decreasing order of energy 
A. $n=3, l =0, m =0$ 
B. $n =4, l =0, m =0$ 
C. $n =3, l =1, m =0$ 
D. $n =3, l =2, m =1$ 
The correct option for the order is :

Maximum number of electrons that can be accommodated in shell with $n=4$ are:
The wave function $(\Psi)$ of $2 s$ is given by $\Psi_{2 n }=\frac{1}{2 \sqrt{2 \pi}}\left(\frac{1}{a_0}\right)^{1 / 2}\left(2-\frac{r}{a_0}\right) e^{-\frac{r}{2 a_0}}$ At $r=r_0$, radial node is formed Thus, $r_0$ in terms of $a_0$