Description : An electron in an excited hydrogen atom acquired an energy of 12.1 eV. To what energy level did it jump? How many spectral lines may be emitted in the
Last Answer : An electron in an excited hydrogen atom acquired an energy of 12.1 eV. To what ... to lower energy level? Calculate the corresponding wavelengths.
Description : Hydrogen atom electron is excited to n = 4 state , in the spectrum of emitted radiation , number of lines in the ultravoilet and visible regions are r
Last Answer : Hydrogen atom electron is excited to n = 4 state , in the spectrum of emitted radiation , number of lines in the ... 1 , 3 C. 2 , 3 D. 3 , 2
Description : Hydrogen atom is excited from ground state to another state with principal quantum number equal to 4. Then the number of spectral lines in the emission spectra will be - (1) 2 (2) 6 (3) 5 (4) 3
Last Answer : (2) 6 Explanation: Number of spectral lines from a state n to ground state is = n (n-1)/2 =4(4-1)/2 =12/2 =6
Description : In a hydrogen like ionized atom a single electron is orbiting around the stationary positive charge. If a spectral line of `lambda` equal to `4861Å` i
Last Answer : In a hydrogen like ionized atom a single electron is orbiting around the stationary positive charge. If a ... to `n=6` and also identify the element.
Description : A hydrogen atom in state `n = 6` makes two successive transition and reaches the ground state in the first transition a photon of `1.13eV` is emitted
Last Answer : A hydrogen atom in state `n = 6` makes two successive transition and reaches the ground state in the ... is the value of n in the intermediate state?
Description : An electron in an atom jumps in such a way that its kinetic energy changes from x to `x/4`. The change in potential energy will be:
Last Answer : An electron in an atom jumps in such a way that its kinetic energy changes from x to `x/4`. The change in potential ... `+(3)/(4)x` D. `-(3)/(4)x`
Description : Evidence for the existence of energy level in atom is supplied by (a) Atomic numbers (b) Atomic radii (c) Spectral lines (d) Mass defects
Last Answer : Ans:(c)
Description : When the wavelength of a spectral line emitted from an object decreases which end of the visible light spectrum does it move toward and what is the object and motion relative to Earth?
Last Answer : Need answer
Description : Is the width of the range of wavelengths emitted by the light source a. Bandwidth b. Chromatic Dispersion c. Spectral width d. Beamwidth
Last Answer : c. Spectral width
Description : Pick up the correct statement from the following: (A) A graphical representation of spectral reflectance verses the various growth stages of a crop, depicts a phonologic pattern B) The changes in ... characteristic of the object which helps in the identification of the object (D) All of these
Last Answer : Answer: Option D
Description : Is the width of the range of wavelengths emitted by the light source ∙ a. Bandwidth ∙ b. Chromatic Dispersion ∙ c. Spectral width ∙ d. Beamwidth
Description : The ionisation potential of hydrogen atom is `13.6` volt. The energy required to remove an electron in the `n = 2` state of the hydrogen atom is
Last Answer : The ionisation potential of hydrogen atom is `13.6` volt. The energy required to remove an electron in the `n = 2` ... . 13.6 eV C. 6.8 eV D. 3.4 eV
Description : The average current due to an electron orbiting the proton in the `n^(th)` Bohr orbit of the hydrogen atom is
Last Answer : The average current due to an electron orbiting the proton in the `n^(th)` Bohr orbit of the hydrogen atom ... `propn^3` C. `propb` D. none of these
Description : The angular momentum J of the electron in a hydrogen atom is proportional to `n^(th)` power of r (radius of the orbit) where n is :-
Last Answer : The angular momentum J of the electron in a hydrogen atom is proportional to `n^(th)` power of r (radius of the orbit ... B. `-1` C. `(1)/(2)` D. None
Description : For the hydrogen atom, which series describes electron transitions to the N = 2 orbit? Is it the: w) Lyman series x) Paschen series y) Balmer series z) Pfund series
Last Answer : ANSWER: Y -- BALMER SERIES
Description : For the hydrogen atom, which series describes electron transitions to the N=1 orbit, the lowest energy electron orbit? Is it the: w) Lyman series x) Balmer series y) Paschen series z) Pfund series
Last Answer : ANSWER: W -- LYMAN SERIES
Description : An electron jumps in to the next lower orbit when loses what?
Last Answer : Answer: One quantum of energy.
Description : Find the minimum energy that a `gamma`-ray must have to give rise to an electron -positron pair. `{:("Mass of electron",= 0.00055 am u,),("Mass of pos
Last Answer : Find the minimum energy that a `gamma`-ray must have to give rise to an electron -positron pair. `{:("Mass ... ("Mass of positron",= 0.00055 am u,):}`
Description : An electron collides with a fixed hydrogen atom in its ground state. Hydrogen atom gets excited and the colliding electron loses all its kinetic energ
Last Answer : An electron collides with a fixed hydrogen atom in its ground state. Hydrogen atom gets excited and the colliding ... eV C. 12.1 eV D. 13.6 eV
Description : The total energy of the electron in the hydrogen atom in the ground state is -13.6 eV. Which of the following is its kinetic energy in the first excit
Last Answer : The total energy of the electron in the hydrogen atom in the ground state is -13.6 eV. Which of the following is its ... 6.8 eV C. 3.4 eV D. 1.825 eV
Description : If the total energy of an electron in a hydrogen atom in an exicted state is -3.4 eV , then the de- broglie wavelegth of the electron is :-
Last Answer : If the total energy of an electron in a hydrogen atom in an exicted state is -3.4 eV , then the de- broglie ... `5xx10^(-9)m` D. `9.3xx10^(-12)m`
Description : The energy required to excite an electron from the ground state of hydrogen atom to the first excited state, is
Last Answer : The energy required to excite an electron from the ground state of hydrogen atom to the first excited state, is A. ... 10.2 eV C. 0.85 eV D. 12.75eV
Description : An electron , in a hydrogen-like atom, is in excited state. It has a total energy of -3.4 eV. Calculate (a) the kinetic energy and (b) the de Broglie
Last Answer : An electron , in a hydrogen-like atom, is in excited state. It has a total energy of -3.4 ... and (b) the de Broglie wavelength of the electron.
Description : Find the binding energy of an electron in the ground state of a hydrogen like atom in whose spectrum the third Balmer line is equal to 108.5 mm.
Last Answer : Find the binding energy of an electron in the ground state of a hydrogen like atom in whose spectrum the third Balmer line is equal to 108.5 mm.
Description : The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2nd orbit to 3rd orbit is?
Last Answer : 5x/36
Description : A double ionised lithium atom is hydrogen like with atomic number `3` (i)Find the wavelength of the radiation to excite the electron in `Li^(++)`from
Last Answer : A double ionised lithium atom is hydrogen like with atomic number `3` (i)Find the wavelength ... the emission spectrum of the above excited system ?
Description : The first Hydrogen spectral series was identified , in 1885, by a) J.R.Rydberg b) J.J.Balmer c) Theodore Lyman d) F. S. Brackett
Last Answer : b) J.J.Balmer
Description : How many times lighter is an electron than an atom of hydrogen ?
Last Answer : An electron is 1638 times lighter than a hydrogen atom.
Description : In a hydrogen atom, the electron makes about `0.6xx10^(16)` revolutions per second around the nucleus. Determine the average current at any point on t
Last Answer : In a hydrogen atom, the electron makes about `0.6xx10^(16)` revolutions per second around the nucleus. ... at any point on the orbit of the electron.
Description : In hydrogen atom, the electron is making `6.6xx10^(15) rev//sec` around the nucleus in an orbit of radius `0.528 A`. The magnetic moment `(A-m^(2)) wi
Last Answer : In hydrogen atom, the electron is making `6.6xx10^(15) rev//sec` around the nucleus in an orbit of radius `0. ... ` C. `1xx10^(-23)` D. `1xx10^(-27)`
Description : In hydrogen atom, an electron is revolving in the orbit of radius `0.53 Å` with `6.6xx10^(15) rotations//second`. Magnetic field produced at the centr
Last Answer : In hydrogen atom, an electron is revolving in the orbit of radius `0.53 Å` with `6.6xx10^(15) rotations//second`. ... 5 Wb//m^(2)` D. `125 Wb/m^(2)`
Description : What did the scientist say to the hydrogen atom that claimed to have lost the electron?
Last Answer : The scientist said "Are you positive"
Description : According to Bohr's theory of hydrogen atom, the angular momentum of the electron in the fourth orbit is given by (a) h/2p (b) 4h/p (c) h/p (d) 2h/p
Last Answer : Ans:(d)
Description : The nucleus of a hydrogen atom consists of (a) One proton (b) One proton + two neutrons (c) One neutron only (d) One electron only
Last Answer : Ans:(a)
Description : Pick out the wrong statement. (A) The nucleus of a hydrogen atom is identical with a proton (B) A, β-ray particle is identical with an electron (C) Mass of an electron is about 1/1800th of the lightest nucleus (D) Positron is heavier than a proton
Last Answer : (D) Positron is heavier than a proton
Description : Chlorine free radicals react with methane by : (a) donating their free-radical electron to methane to form chloromethane. (b) abstracting a hydrogen atom from methane, and producing ... produce chloromethane. (d) forming a carbonium ion intermediate that rapidly dissociates to form chloromethane
Last Answer : abstracting a hydrogen atom from methane, and producing HCl and a methyl radical
Description : The quantized Bohr orbit radius of electron in hydrogen atom is given by a) n2 r3 b) nr1 c) n2 r2 d) n2 r1
Last Answer : d) n2 r1
Description : Who received the Nobel Prize in Physics in 1922 for his theory which predicted the electron orbits of the Hydrogen atom?
Last Answer : ANSWER: (NIELS) BOHR
Description : How many electron lone pairs are on the central atom in Hydrogen Sulfide?
Last Answer : ANSWER: TWO
Description : The _____ is equal to the number of electrons emitted per second times the electron charge ∙ a. Intensity ∙ b. Optical power ∙ c. Photocurrent ∙ d. Responsitivity
Last Answer : c. Photocurrent
Description : What does the principal quantum number ‘n’ and azimuthal quantum number ‘l’ of an electron belonging to an atom represent?
Last Answer : What does the principal quantum number ‘n’ and azimuthal quantum number ‘l’ of an electron belonging to an atom represent?
Description : If a firm wantedto transmit data from 1,000 punchedcards toa remote computer, they would use a(n) A. POS terminal B. data collection terminal C. batch processingterminal D. intelligent terminal E. None of the above
Last Answer : batch processingterminal
Description : Number of secondary neutron emitted on fission of an atom of U-235 by slow neutron bombardment is (A) 3 (B) 235 (C) 200 (D) 92
Last Answer : (A) 3
Description : A hydrogen like atom (atomic number `z`) is in a higher excited state of quantum number `n`. This excited atom can make a transition to the first exci
Last Answer : A hydrogen like atom (atomic number `z`) is in a higher excited state of quantum number `n`. This ... eV` respectively. Determine the value of `(n+z)`
Description : A hydrogen like atom (atomic number Z) is in a higher excited state of quantum number n. The excited atom can make a transition to the first excited s
Last Answer : A hydrogen like atom (atomic number Z) is in a higher excited state of quantum number n. The excited ... . (lonization energy of H-atom = 13.6 eV)
Description : A hydrogen atom in a having a binding of `0.85eV`makes transition to a state with excited energy `10.2eV`(a) identify the quantum number n of theupper
Last Answer : A hydrogen atom in a having a binding of `0.85eV`makes transition to a state with excited ... (b) Find the wavelength of the emitted radiation
Description : Assertion `(A) : K-` shell electron capture is detected by analyzing the wavelength of `X-` ray emitted. Reason `(R):` The wavelength of the `X-` ray
Last Answer : Assertion `(A) : K-` shell electron capture is detected by analyzing the wavelength of `X-` ray emitted. ... D. If both (A) and (R ) are incorrect.