|
Calculate the wave number for the longest wavelength transition in the Balmer series of atomic hydrogen
|
|
0
|
10888
|
August 10, 2016
|
|
Yellow light emitted from a sodium lamp has a wavelength (A) of 580 nm. Calculate the frequency (u) and wave number (v ) of the yellow light
|
|
0
|
6250
|
August 10, 2016
|
|
Arrange the following type of radiations in increasing order of frequency : (a) radiation from microwave oven, (b) amber light from traffic signal, (c) radiation from FM radio (d) cosmic rays from outer space and (e) X-rays
|
|
0
|
1240
|
August 10, 2016
|
|
Write de-Broglie expression for wavelength of matter wave
|
|
0
|
2541
|
August 10, 2016
|
|
What is the maximum number of emission lines when the excited electron of a H atom in n= 6 drops to the ground state?
|
|
0
|
885
|
August 10, 2016
|
|
How many neutrons and protons are there in the following nuclei?
|
|
1
|
2061
|
August 9, 2016
|
|
Give the drawbacks of Rutherford's atomic model
|
|
0
|
9395
|
August 9, 2016
|
|
Give the number of electron is the species
|
|
0
|
613
|
August 9, 2016
|
|
2 x ${{10}^{8}}$ atoms of carbon are arranged side by side. Calculate the radius of carbon atom if the length of this arrangement is 2.4 cm
|
|
0
|
1509
|
August 9, 2016
|
|
Which of the following are isoelectronic species i.e., those having the same number of electrons?
|
|
1
|
3385
|
August 9, 2016
|
|
An ion with mass number 56 contains 3 units of positive charge and 30.4% more neutrons than electrons. Assing the symbol to this ion
|
|
0
|
1967
|
August 9, 2016
|
|
In Rutherford's experiment, generally the thin foil of heavy atoms, like gold, platinum etc
|
|
1
|
462
|
August 9, 2016
|
|
Describe the important characteristics of anode or positive rays and its importance in the discovery of proton?
|
|
0
|
3133
|
August 9, 2016
|
|
Which type of 'Atomic model' was presented by Rutherford ? Describe in brief
|
|
0
|
540
|
August 9, 2016
|
|
An ion with mass number 37 possesses one unit of negative charge
|
|
1
|
6433
|
August 9, 2016
|
|
Why does charge-to-mass ratio of positive rays depend on the reside gas in the discharge tube?
|
|
1
|
1841
|
August 9, 2016
|
|
Compare the properties of electrons, protons and neutrons
|
|
0
|
1130
|
August 9, 2016
|
|
In Milikan's experiment, static electric charge on the oil drops has been obtained by shining X-rays
|
|
1
|
1226
|
August 9, 2016
|
|
Find (a) the total number and (b) total mass of neutrons in 7 mg of ${}^{14}C$. (Assume that mass of a neutron = 1.675 x ${{10}^{-27}}$ kg)
|
|
1
|
3143
|
August 9, 2016
|
|
Calculate number of electrons which will together weigh one gram
|
|
1
|
3881
|
August 9, 2016
|
|
Differentiate between Orbit and Orbital
|
|
0
|
10565
|
August 9, 2016
|
|
Calculate the total number of electrons present in 1 mol of C${{H}_{4}}$ ?[Atomic Number of C = 6, H = 1]
|
|
0
|
375
|
August 9, 2016
|
|
An atom of an element contains 29 electrons and 35 neutrons, Deduce
|
|
1
|
1392
|
August 9, 2016
|
|
Why energy of electron is negative?
|
|
0
|
4984
|
August 9, 2016
|
|
How many electrons are present in N${{O}_{3}}^{-}$ ion?
|
|
0
|
549
|
August 9, 2016
|
|
Why do electrons have fractional atomic masses?
|
|
0
|
456
|
August 9, 2016
|
|
What are nucleons?
|
|
0
|
754
|
August 9, 2016
|
|
In Rutherford's experiment, generally the thin foil of heavy atoms, like gold, plantinum etc. have been used to be bombarded by the a particles
|
|
1
|
464
|
August 9, 2016
|
|
Symbols ${}_{35}^{79}Br$ and ${}^{79}Br$ can be written, whereas symbol ${}_{35}^{79}Br$ and ${}_{35}Br$ are not acceptable Answer briefly
|
|
0
|
860
|
August 9, 2016
|
|
Name the element whose isotope has mass number 14 and having 8 neutrons
|
|
0
|
1787
|
August 9, 2016
|