Bohr's Model for the Hydrogen Atom

According to the Bohr Theory, among the following, which transition in the hydrogen atom will give rise to the least energetic photon?

The energy of the second Bohr orbit of the hydrogen atom is $-328 \mathrm{kJ} {\mathrm{mol}}^{-1}$. Hence, the energy of the fourth Bohr orbit would be

The radius of hydrogen atom in the ground state is  $0.53\mathrm{\AA }.$  The radius of  ${\mathrm{Li}}^{2+}$ ion (Atomic number = $3$) in first orbit is

In a hydrogen atom, if the energy of an electron in the ground state is  $\text{–13.6 eV}$, then that in the $\text{2nd}$ excited state is

Which of the following is the correct value of most probable radius for locating the electron in ${\mathrm{He}}^{+}$?

Assertion : The spectrum of ${\mathrm{He}}^{+}$ is expected to be similar to that of hydrogen.

Reason : ${\mathrm{He}}^{+}$ is also one electron system.

When an electron in an atom absorbs a definite amount of energy, the electron jump from its most stable state to some high energy level called the _____ state.

Define excited state for an atom.

The first orbit is called the ground state in hydrogen like atoms.

Discuss the ground state of hydrogen like atoms.

The excited state is the most stable state for an electron in an atom.

What do you mean by excited state in an atom?

Using Bohr's theory, calculate the radius(in $\mathrm{\AA }$) of the tenth orbit in the hydrogen atom.

Express the answer to the nearest integer value.

In a certain electronic transition in the hydrogen atoms from an initial state $\left(1\right)$ to the final state $\left(2\right)$, the difference in the orbital radius $({\mathrm{r}}_1-{\mathrm{r}}_2)$ is $24$ times the first Bohr radius. Identify the transition.

Which is the correct relation between energies of one electron species?

${\mathrm{E}}_1=$Energy of electron in the first Bohr orbit, ${\mathrm{E}}_2=$Energy of electron in the second Bohr orbit, ${\mathrm{E}}_3=$Energy of electron in the third Bohr orbit, ${\mathrm{E}}_4=$Energy of electron in the fourth Bohr orbit.

The radii of two of the first four Bohr orbits of the hydrogen atom are in the ratio $1:4.$ The energy difference between them may be

Suppose that an excited hydrogen atom returns to the ground state, the wavelength of the emitted photon is $\mathrm{\lambda }$. What will be the principal quantum number of the excited state?

If Bohr radius is represented by ${\mathrm{a}}_0,$ the radius of the second orbit of helium ion $\left(\mathrm{H}{\mathrm{e}}^{+}\right)$ will be _____ $\stackrel{°}{\mathrm{A}}$. (Correct upto 3 decimal places)

If the velocity of the revolving electron of ${\mathrm{He}}^{+}$ in the first orbit $(\mathrm{n}=1)$ is $\mathrm{v},$ the velocity of the electron in the second orbit is: