Bohr's model of hydrogen atom

What are the uses of atoms and molecules?

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?

The energy of electrons in atom is _____. (quantised/ not quantised)

Ionization energy of ${\mathrm{He}}^{+}$ is $19.6\times {10}^{-18}{\mathrm{Jatom}}^{–1}$. The energy of the first stationary state $(\mathrm{n} = 1)$ of ${\mathrm{Li}}^{2+}$ is

In the ground state of the hydrogen atom, it's Bohr radius is given as $5.3\times {10}^{-11} \mathrm{m}$. The atom is excited such that the radius become $21.2\times {10}^{-11} \mathrm{m}$. Find the value of the principal quantum number and the total energy of the atom in this excited state.

According to Bohr’s theory, the angular momentum of an electron in $5^{\mathrm{t}\mathrm{h}}$ orbit is

For which of the following species, Bohr’s theory is not applicable?

The energy absorbed by the electron is: 

The kinetic energy of the electron is: 

The ratio of the potential energy of the$n=2$electrons for H atom to that of $H{e}^{\oplus }$ ion is

Find the total no. of spectral lines emitted from a sample having all $\mathrm{H}-$atoms in$\mathrm{n} = 2, {\mathrm{He}}^{+}$ ions in $\mathrm{n} = 4 \& {\mathrm{Li}}^{+2}$ ion in $\mathrm{n} = 6 ?$

If an $e^{–}$ is revolving in the first bohr orbit of a $H-$ atom with a velocity of $2.19\times {10}^8 cm{s}^{-1},$ what will be the velocity of the $e^{–}$ in the third orbit of $H-$ atom?

The scientist who proposed the atomic model based on the quantization of energy for the first time is

Which statements concerning Bohr's model of an atom?