356478
When an electron in hydrogen atom revolves in stationary orbit, it
1 Does not radiate light through its velocity changes
2 Does not radiate light and velocity remains unchanged
3 Radiates light but its velocity is unchanged
4 Radiates light with the change of energy
Explanation:
According to Bohr’s quantisation principle, if an electron revolves in a stationary orbit which has fixed energy, will not radiate light. Since,the direction of velocity changes, so we can say its velocity changes
MHTCET - 2016
PHXII12:ATOMS
356479
The energy \(E\) of a hydrogen atom with principal quantum number \(n\) is given by \(E = \frac{{13.6}}{{{n^2}}}eV\). The energy of a photon ejected when the electron jumps from \(n=3\) state to \(n=2\) state of hydrogen is approximately
1 \(1.5\,eV\)
2 \(0.85\,eV\)
3 \(3.3\,eV\)
4 \(1.9\,eV\)
Explanation:
The energy of ejected photon, \(E=R h c\left(\dfrac{1}{n_{1}^{2}}-\dfrac{1}{n_{2}^{2}}\right)\) where, transistion takes place from \(n_{1}\) to \(n_{2}\). \( = 13.6\left( {\frac{1}{{{2^2}}} - \frac{1}{{{3^2}}}} \right)\) \( = 13.6 \times \frac{5}{{36}} = 1.9\,eV\)
AIIMS - 2013
PHXII12:ATOMS
356480
The radius of inner most orbit of hydrogen atom is \(5.3 \times {10^{ - 11}}\;m\). What is the radius of third allowed orbit of hydrogen atom?
1 1.06 \( \mathop A^{~~\circ} \)
2 1.59 \( \mathop A^{~~\circ} \)
3 4.77 \( \mathop A^{~~\circ} \)
4 0.53 \( \mathop A^{~~\circ} \)
Explanation:
Radius of \(n^{\text {th }}\) orbit in Hydrogen Atom \({r_n} = 0.53 \times \frac{{{n^2}}}{Z}\mathop {{\rm{ }}A}\limits^{\;\;^\circ } \) For \(H, Z=1\) \(\Rightarrow\) Radius of third orbit \({r_3} = 0.53 \times \frac{{{{(3)}^2}}}{{(1)}}\mathop {{\rm{ }}A}\limits^{\;\;^\circ } = 4.77\mathop {{\rm{ }}A}\limits^{\;\;^\circ } \) Correct option is (3).
356478
When an electron in hydrogen atom revolves in stationary orbit, it
1 Does not radiate light through its velocity changes
2 Does not radiate light and velocity remains unchanged
3 Radiates light but its velocity is unchanged
4 Radiates light with the change of energy
Explanation:
According to Bohr’s quantisation principle, if an electron revolves in a stationary orbit which has fixed energy, will not radiate light. Since,the direction of velocity changes, so we can say its velocity changes
MHTCET - 2016
PHXII12:ATOMS
356479
The energy \(E\) of a hydrogen atom with principal quantum number \(n\) is given by \(E = \frac{{13.6}}{{{n^2}}}eV\). The energy of a photon ejected when the electron jumps from \(n=3\) state to \(n=2\) state of hydrogen is approximately
1 \(1.5\,eV\)
2 \(0.85\,eV\)
3 \(3.3\,eV\)
4 \(1.9\,eV\)
Explanation:
The energy of ejected photon, \(E=R h c\left(\dfrac{1}{n_{1}^{2}}-\dfrac{1}{n_{2}^{2}}\right)\) where, transistion takes place from \(n_{1}\) to \(n_{2}\). \( = 13.6\left( {\frac{1}{{{2^2}}} - \frac{1}{{{3^2}}}} \right)\) \( = 13.6 \times \frac{5}{{36}} = 1.9\,eV\)
AIIMS - 2013
PHXII12:ATOMS
356480
The radius of inner most orbit of hydrogen atom is \(5.3 \times {10^{ - 11}}\;m\). What is the radius of third allowed orbit of hydrogen atom?
1 1.06 \( \mathop A^{~~\circ} \)
2 1.59 \( \mathop A^{~~\circ} \)
3 4.77 \( \mathop A^{~~\circ} \)
4 0.53 \( \mathop A^{~~\circ} \)
Explanation:
Radius of \(n^{\text {th }}\) orbit in Hydrogen Atom \({r_n} = 0.53 \times \frac{{{n^2}}}{Z}\mathop {{\rm{ }}A}\limits^{\;\;^\circ } \) For \(H, Z=1\) \(\Rightarrow\) Radius of third orbit \({r_3} = 0.53 \times \frac{{{{(3)}^2}}}{{(1)}}\mathop {{\rm{ }}A}\limits^{\;\;^\circ } = 4.77\mathop {{\rm{ }}A}\limits^{\;\;^\circ } \) Correct option is (3).
356478
When an electron in hydrogen atom revolves in stationary orbit, it
1 Does not radiate light through its velocity changes
2 Does not radiate light and velocity remains unchanged
3 Radiates light but its velocity is unchanged
4 Radiates light with the change of energy
Explanation:
According to Bohr’s quantisation principle, if an electron revolves in a stationary orbit which has fixed energy, will not radiate light. Since,the direction of velocity changes, so we can say its velocity changes
MHTCET - 2016
PHXII12:ATOMS
356479
The energy \(E\) of a hydrogen atom with principal quantum number \(n\) is given by \(E = \frac{{13.6}}{{{n^2}}}eV\). The energy of a photon ejected when the electron jumps from \(n=3\) state to \(n=2\) state of hydrogen is approximately
1 \(1.5\,eV\)
2 \(0.85\,eV\)
3 \(3.3\,eV\)
4 \(1.9\,eV\)
Explanation:
The energy of ejected photon, \(E=R h c\left(\dfrac{1}{n_{1}^{2}}-\dfrac{1}{n_{2}^{2}}\right)\) where, transistion takes place from \(n_{1}\) to \(n_{2}\). \( = 13.6\left( {\frac{1}{{{2^2}}} - \frac{1}{{{3^2}}}} \right)\) \( = 13.6 \times \frac{5}{{36}} = 1.9\,eV\)
AIIMS - 2013
PHXII12:ATOMS
356480
The radius of inner most orbit of hydrogen atom is \(5.3 \times {10^{ - 11}}\;m\). What is the radius of third allowed orbit of hydrogen atom?
1 1.06 \( \mathop A^{~~\circ} \)
2 1.59 \( \mathop A^{~~\circ} \)
3 4.77 \( \mathop A^{~~\circ} \)
4 0.53 \( \mathop A^{~~\circ} \)
Explanation:
Radius of \(n^{\text {th }}\) orbit in Hydrogen Atom \({r_n} = 0.53 \times \frac{{{n^2}}}{Z}\mathop {{\rm{ }}A}\limits^{\;\;^\circ } \) For \(H, Z=1\) \(\Rightarrow\) Radius of third orbit \({r_3} = 0.53 \times \frac{{{{(3)}^2}}}{{(1)}}\mathop {{\rm{ }}A}\limits^{\;\;^\circ } = 4.77\mathop {{\rm{ }}A}\limits^{\;\;^\circ } \) Correct option is (3).
356478
When an electron in hydrogen atom revolves in stationary orbit, it
1 Does not radiate light through its velocity changes
2 Does not radiate light and velocity remains unchanged
3 Radiates light but its velocity is unchanged
4 Radiates light with the change of energy
Explanation:
According to Bohr’s quantisation principle, if an electron revolves in a stationary orbit which has fixed energy, will not radiate light. Since,the direction of velocity changes, so we can say its velocity changes
MHTCET - 2016
PHXII12:ATOMS
356479
The energy \(E\) of a hydrogen atom with principal quantum number \(n\) is given by \(E = \frac{{13.6}}{{{n^2}}}eV\). The energy of a photon ejected when the electron jumps from \(n=3\) state to \(n=2\) state of hydrogen is approximately
1 \(1.5\,eV\)
2 \(0.85\,eV\)
3 \(3.3\,eV\)
4 \(1.9\,eV\)
Explanation:
The energy of ejected photon, \(E=R h c\left(\dfrac{1}{n_{1}^{2}}-\dfrac{1}{n_{2}^{2}}\right)\) where, transistion takes place from \(n_{1}\) to \(n_{2}\). \( = 13.6\left( {\frac{1}{{{2^2}}} - \frac{1}{{{3^2}}}} \right)\) \( = 13.6 \times \frac{5}{{36}} = 1.9\,eV\)
AIIMS - 2013
PHXII12:ATOMS
356480
The radius of inner most orbit of hydrogen atom is \(5.3 \times {10^{ - 11}}\;m\). What is the radius of third allowed orbit of hydrogen atom?
1 1.06 \( \mathop A^{~~\circ} \)
2 1.59 \( \mathop A^{~~\circ} \)
3 4.77 \( \mathop A^{~~\circ} \)
4 0.53 \( \mathop A^{~~\circ} \)
Explanation:
Radius of \(n^{\text {th }}\) orbit in Hydrogen Atom \({r_n} = 0.53 \times \frac{{{n^2}}}{Z}\mathop {{\rm{ }}A}\limits^{\;\;^\circ } \) For \(H, Z=1\) \(\Rightarrow\) Radius of third orbit \({r_3} = 0.53 \times \frac{{{{(3)}^2}}}{{(1)}}\mathop {{\rm{ }}A}\limits^{\;\;^\circ } = 4.77\mathop {{\rm{ }}A}\limits^{\;\;^\circ } \) Correct option is (3).
