Chapter 2 – Atomic Structure
What is the number of photons of light with wavelength 4000 pm which provide 1 Joule of energy ?
12
Nov
What is the number of photons of light with wavelength 4000 pm which provide 1 Joule of energy ? What is the number of photons of light with wavelength 4000 pm which provide 1 Joule of energy ? November 12, 2020 Category: Chapter 2 - Atomic Structure , Chemistry , NCERT Exemplar Class 11 ,
Calculate the wavelength, frequency, and wave number of a light wave whose period is 2.0×10^−10s.
12
Nov
Calculate the wavelength, frequency, and wave number of a light wave whose period is 2.0×10^−10s. and wave number of a light wave whose period is 2.0×10^−10s. Calculate the wavelength frequency November 12, 2020 Category: Chapter 2 - Atomic Structure , Chemistry , NCERT Exemplar Class 11 ,
Find energy of each of the photons which a. correspond to light of frequency 3×10^15Hz. b. have wavelength of 0.50Å.
12
Nov
Find energy of each of the photons which a. correspond to light of frequency 3×10^15Hz. b. have wavelength of 0.50Å. Find energy of each of the photons which a. correspond to light of frequency 3×10^15Hz. b. have wavelength of 0.50Å. November 12, 2020 Category: Chapter 2 - Atomic Structure , Chemistry , NCERT Exemplar Class [...]
Yellow light emitted from a sodium lamp has a wavelength (λ) of 580nm. Calculate the frequency (v) and the wave number (v¯) of the yellow light
12
Nov
Yellow light emitted from a sodium lamp has a wavelength (λ) of 580nm. Calculate the frequency (v) and the wave number (v¯) of the yellow light Yellow light emitted from a sodium lamp has a wavelength (λ) of 580nm. Calculate the frequency (v) and the wave number (v¯) of the yellow light November 12, 2020 [...]
(i) Calculate the total number of electrons present in 1 mole of methane . (ii) Find (a) the total number and (b) the total mass of neutrons in 7 mg of .14C. (Assume that mass of a neutron =1.675×10^−27g)
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Nov
(i) Calculate the total number of electrons present in 1 mole of methane . (ii) Find (a) the total number and (b) the total mass of neutrons in 7 mg of .14C. (Assume that mass of a neutron =1.675×10^−27g) identify the pairs of electrons present in degenerate orbitals : Out of the following pairs of [...]
(i) Calculate the number of electrons which will together with one gram . (ii) Calculate the mass and charge on one mole of electrons .
12
Nov
(i) Calculate the number of electrons which will together with one gram . (ii) Calculate the mass and charge on one mole of electrons . (i) Calculate the number of electrons which will together with one gram . (ii) Calculate the mass and charge on one mole of electrons . November 12, 2020 Category: Chapter [...]
Why was a change in the Bohr Model of atom required ? Due to which important development (s), concept of movement of an electron in an orbit was replaced by the concept of probability of finding electron in an orbital ? What is the name given to the changed model of atom?
12
Nov
Why was a change in the Bohr Model of atom required ? Due to which important development (s), concept of movement of an electron in an orbit was replaced by the concept of probability of finding electron in an orbital ? What is the name given to the changed model of atom? concept of movement [...]
Calculate the energy and frequency of the radiation emitted when an electron jumps from n=3 to n=2 in a hydrogen atom.
12
Nov
Calculate the energy and frequency of the radiation emitted when an electron jumps from n=3 to n=2 in a hydrogen atom. Calculate the energy and frequency of the radiation emitted when an electron jumps from n=3 to n=2 in a hydrogen atom. November 12, 2020 Category: Chapter 2 - Atomic Structure , Chemistry , NCERT [...]
When an electric discharge is passed through hydrogen gas, the hydrogen molecules dissociate to produce excited hydrogen atoms. These excited atoms emit electromagnetic radiation of discrete frequencies which can be given by the general formula v¯=109677[1/n2i−1/nf2] What points of Bohr’s model of an atom can be used to arrive at this formula ? Based on these points derive the above formula giving description of each step and each term.
12
Nov
When an electric discharge is passed through hydrogen gas, the hydrogen molecules dissociate to produce excited hydrogen atoms. These excited atoms emit electromagnetic radiation of discrete frequencies which can be given by the general formula v¯=109677[1/n2i−1/nf2] What points of Bohr’s model of an atom can be used to arrive at this formula ? Based on [...]
Threshold frequency, v0 is the minimum frequency which a photon must possess to eject an electron from a metal. It is different for different metals. When a photon of frequency 1.0×1015s^−1 was allowed to hit a metal surface, an electron having 1.988×10^−19J of kinetic energy was emitted. Calculated the threshold frequency of this metal. equal to 600 nm hits the metal surface.
12
Nov
Threshold frequency, v0 is the minimum frequency which a photon must possess to eject an electron from a metal. It is different for different metals. When a photon of frequency 1.0×1015s^−1 was allowed to hit a metal surface, an electron having 1.988×10^−19J of kinetic energy was emitted. Calculated the threshold frequency of this metal. equal [...]