145746
An electron makes a transition from an excited state to the ground state of a hydrogen like atom. Out of the following statements which one is correct?
1 Kinetic energy decreases, potential energy increases but total energy remains the same.
2 Kinetic energy and total energy decreases but potential energy increases.
3 Kinetic energy increases but potential energy and total energy decreases.
4 Kinetic energy, potential energy and total energy decreases.
Explanation:
C We know tha,t Total energy $=-13.6 \frac{\mathrm{Z}^{2}}{\mathrm{n}^{2}} \mathrm{eV}$ Potential energy $=2 \mathrm{~T}$.E Kinetic energy $=13.6 \frac{\mathrm{Z}^{2}}{\mathrm{n}^{2}} \mathrm{eV}$ Hence, if $\mathrm{n}$ decreases then K.E increases but P.E and T.E decrease.
MHT-CET 2020
ATOMS
145768
In the following atoms and molecules for the transition from $n=2$ to $n=1$, the spectral line of minimum wavelength will be produced by
1 hydrogen atom
2 deuterium atom
3 un-ionized helium
4 di-ionized lithium
Explanation:
D Minimum wavelength of spectral line $\frac{1}{\lambda}=\mathrm{RZ}^{2}\left[\frac{1}{(1)^{2}}-\frac{1}{(2)^{2}}\right]$ For di-ionised lithium the value of $\mathrm{Z}$ is maximum.
UP CPMT-2010
ATOMS
145741
The total energy of an electron in the $n^{\text {th }}$ stationary orbit of the hydrogen atom can be obtained by
145746
An electron makes a transition from an excited state to the ground state of a hydrogen like atom. Out of the following statements which one is correct?
1 Kinetic energy decreases, potential energy increases but total energy remains the same.
2 Kinetic energy and total energy decreases but potential energy increases.
3 Kinetic energy increases but potential energy and total energy decreases.
4 Kinetic energy, potential energy and total energy decreases.
Explanation:
C We know tha,t Total energy $=-13.6 \frac{\mathrm{Z}^{2}}{\mathrm{n}^{2}} \mathrm{eV}$ Potential energy $=2 \mathrm{~T}$.E Kinetic energy $=13.6 \frac{\mathrm{Z}^{2}}{\mathrm{n}^{2}} \mathrm{eV}$ Hence, if $\mathrm{n}$ decreases then K.E increases but P.E and T.E decrease.
MHT-CET 2020
ATOMS
145768
In the following atoms and molecules for the transition from $n=2$ to $n=1$, the spectral line of minimum wavelength will be produced by
1 hydrogen atom
2 deuterium atom
3 un-ionized helium
4 di-ionized lithium
Explanation:
D Minimum wavelength of spectral line $\frac{1}{\lambda}=\mathrm{RZ}^{2}\left[\frac{1}{(1)^{2}}-\frac{1}{(2)^{2}}\right]$ For di-ionised lithium the value of $\mathrm{Z}$ is maximum.
UP CPMT-2010
ATOMS
145741
The total energy of an electron in the $n^{\text {th }}$ stationary orbit of the hydrogen atom can be obtained by
145746
An electron makes a transition from an excited state to the ground state of a hydrogen like atom. Out of the following statements which one is correct?
1 Kinetic energy decreases, potential energy increases but total energy remains the same.
2 Kinetic energy and total energy decreases but potential energy increases.
3 Kinetic energy increases but potential energy and total energy decreases.
4 Kinetic energy, potential energy and total energy decreases.
Explanation:
C We know tha,t Total energy $=-13.6 \frac{\mathrm{Z}^{2}}{\mathrm{n}^{2}} \mathrm{eV}$ Potential energy $=2 \mathrm{~T}$.E Kinetic energy $=13.6 \frac{\mathrm{Z}^{2}}{\mathrm{n}^{2}} \mathrm{eV}$ Hence, if $\mathrm{n}$ decreases then K.E increases but P.E and T.E decrease.
MHT-CET 2020
ATOMS
145768
In the following atoms and molecules for the transition from $n=2$ to $n=1$, the spectral line of minimum wavelength will be produced by
1 hydrogen atom
2 deuterium atom
3 un-ionized helium
4 di-ionized lithium
Explanation:
D Minimum wavelength of spectral line $\frac{1}{\lambda}=\mathrm{RZ}^{2}\left[\frac{1}{(1)^{2}}-\frac{1}{(2)^{2}}\right]$ For di-ionised lithium the value of $\mathrm{Z}$ is maximum.
UP CPMT-2010
ATOMS
145741
The total energy of an electron in the $n^{\text {th }}$ stationary orbit of the hydrogen atom can be obtained by
145746
An electron makes a transition from an excited state to the ground state of a hydrogen like atom. Out of the following statements which one is correct?
1 Kinetic energy decreases, potential energy increases but total energy remains the same.
2 Kinetic energy and total energy decreases but potential energy increases.
3 Kinetic energy increases but potential energy and total energy decreases.
4 Kinetic energy, potential energy and total energy decreases.
Explanation:
C We know tha,t Total energy $=-13.6 \frac{\mathrm{Z}^{2}}{\mathrm{n}^{2}} \mathrm{eV}$ Potential energy $=2 \mathrm{~T}$.E Kinetic energy $=13.6 \frac{\mathrm{Z}^{2}}{\mathrm{n}^{2}} \mathrm{eV}$ Hence, if $\mathrm{n}$ decreases then K.E increases but P.E and T.E decrease.
MHT-CET 2020
ATOMS
145768
In the following atoms and molecules for the transition from $n=2$ to $n=1$, the spectral line of minimum wavelength will be produced by
1 hydrogen atom
2 deuterium atom
3 un-ionized helium
4 di-ionized lithium
Explanation:
D Minimum wavelength of spectral line $\frac{1}{\lambda}=\mathrm{RZ}^{2}\left[\frac{1}{(1)^{2}}-\frac{1}{(2)^{2}}\right]$ For di-ionised lithium the value of $\mathrm{Z}$ is maximum.
UP CPMT-2010
ATOMS
145741
The total energy of an electron in the $n^{\text {th }}$ stationary orbit of the hydrogen atom can be obtained by
