Chapter 2 – Atomic Structure
Following results are observed when sodium metal is irradiated with different wavelengths. Calculate (a) threshold wavelength and (b) Planck’s constant. λ(nm) v×10−5(cms−1)500 2.55 450 4.35 400 5.35
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Nov
Following results are observed when sodium metal is irradiated with different wavelengths. Calculate (a) threshold wavelength and (b) Planck’s constant. λ(nm) v×10−5(cms−1)500 2.55 450 4.35 400 5.35 Following results are observed when sodium metal is irradiated with different wavelengths. Calculate (a) threshold wavelength and (b) Planck's constant. λ(nm) v×10−5(cms−1)500 2.55 450 4.35 400 5.35 November [...]
The longest wavelength doublet absorption is observed at 589 and 589.6nm. Calculate the frequency of each transition and energy difference between two excited states.
12
Nov
The longest wavelength doublet absorption is observed at 589 and 589.6nm. Calculate the frequency of each transition and energy difference between two excited states. The longest wavelength doublet absorption is observed at 589 and 589.6nm. Calculate the frequency of each transition and energy difference between two excited states. November 12, 2020 Category: Chapter 2 - [...]
Lifetimes of the molecules in the excited states are often measured by using pulsed radiation source of duration nearly in the nano second range. If the radiation source has the duration of 2 ns and the number of photons emitted during the pulse is 2.5×10^15, calculate the energy of the source.
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Nov
Lifetimes of the molecules in the excited states are often measured by using pulsed radiation source of duration nearly in the nano second range. If the radiation source has the duration of 2 ns and the number of photons emitted during the pulse is 2.5×10^15, calculate the energy of the source. What is the lowest [...]
In astronomical observations, signals observed from the distant stars are generally weak. If the photon detector receives a total of 3.15 × 10^−18J from the radiations of 600 nm, calculate the number of photons received by the detector.
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Nov
In astronomical observations, signals observed from the distant stars are generally weak. If the photon detector receives a total of 3.15 × 10^−18J from the radiations of 600 nm, calculate the number of photons received by the detector. calculate the number of photons received by the detector. In astronomical observations signals observed from the distant [...]
Neon gas is generally used in the sign boards. If it emits strongly at 616nm, calculate a. The frequency of emission, b. The distance travelled by this radiation in 30s c. The energy of quantum and d. The number of quanta present if it produces 2J of energy.
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Nov
Neon gas is generally used in the sign boards. If it emits strongly at 616nm, calculate a. The frequency of emission, b. The distance travelled by this radiation in 30s c. The energy of quantum and d. The number of quanta present if it produces 2J of energy. b. The distance travelled by this radiation [...]
Nitrogen laser produces a radiation at a wavelength of 33.71 nm. If the number of photons emitted is 5.6×10^24. calculate the power of this laser.
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Nov
Nitrogen laser produces a radiation at a wavelength of 33.71 nm. If the number of photons emitted is 5.6×10^24. calculate the power of this laser. Nitrogen laser produces a radiation at a wavelength of 33.71 nm. If the number of photons emitted is 5.6×10^24. calculate the power of this laser. November 12, 2020 Category: Chapter [...]
An ion with mass number 37 possesses one unit off negative charge. If the ion contains 11.1% more neutrons than electrons, find the symbol of the ion.
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Nov
An ion with mass number 37 possesses one unit off negative charge. If the ion contains 11.1% more neutrons than electrons, find the symbol of the ion. An ion with mass number 37 possesses one unit off negative charge. If the ion contains 11.1% more neutrons than electrons find the symbol of the ion. November [...]
An element with mass number 81 contains 31.7% more neutrons as compared to protons. Assign the atomic symbol.
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Nov
An element with mass number 81 contains 31.7% more neutrons as compared to protons. Assign the atomic symbol. An element with mass number 81 contains 31.7% more neutrons as compared to protons. Assign the atomic symbol. November 12, 2020 Category: Chapter 2 - Atomic Structure , Chemistry , NCERT Exemplar Class 11 ,
A certain particle carries 2.5×10^−16C of static electric charge. Calculate the number of electrons present in it.
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Nov
A certain particle carries 2.5×10^−16C of static electric charge. Calculate the number of electrons present in it. A certain particle carries 2.5×10^−16C of static electric charge. Calculate the number of electrons present in it. November 12, 2020 Category: Chapter 2 - Atomic Structure , Chemistry , NCERT Exemplar Class 11 ,
The diameter of zinc atom is 2.6Å. Calculate (a) radius of zinc atom in pm and (b) number of atoms present in a length of 1.6 cm if the atoms are arranged side by side lengthwise.
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Nov
The diameter of zinc atom is 2.6Å. Calculate (a) radius of zinc atom in pm and (b) number of atoms present in a length of 1.6 cm if the atoms are arranged side by side lengthwise. The diameter of zinc atom is 2.6Å. Calculate (a) radius of zinc atom in pm and (b) number of [...]