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Champ Jee
Subject: Chemistry
, asked on 14/4/18
Question 10.
10. The number of electrons in Ca having minimum value of
n
l
×
m
l
is.
(Consider only non-zero values of
l
and m)
(A) 6 (B) 3 (C) 4 (D) None of these
Answer
2
Champ Jee
Subject: Chemistry
, asked on 14/4/18
Q. Calculate the number of radial nodes for :
Answer
2
Divya Mahesh
Subject: Chemistry
, asked on 21/3/18
What's the difference between a proton, an alpha particle and a photon ? Aren't they all positively charged species ?
Answer
1
Erw Trjerth
Subject: Chemistry
, asked on 19/3/18
Define threshold frequency .Threshold frequency of a metal is
7
·
0
×
10
14
S
-
1
.Calculate the kinetic energy of an electron emitted when radiation of frequency
1
·
0
×
10
5
S
-
1
hits the metal .
h
=
6
·
626
×
10
-
34
J
s
Answer
1
Erw Trjerth
Subject: Chemistry
, asked on 19/3/18
Solve this:
Q. Among 2P, 3P and 4P, orbitals, which experiences lowest effective nuclear charge. Why?
Answer
1
Erw Trjerth
Subject: Chemistry
, asked on 19/3/18
Solve this:
Answer
2
Ruchira Das
Subject: Chemistry
, asked on 16/3/18
threshold frequency is the minimum frequency which a photon must posses to eject an electron from a metal. it is different for different metals.when a phototn of frequency 1.0*10^15 sec was allowed to hit a metal surface, an electron having 1.988*10^19 j of kinetic energy was emitted. calculate the threshold frequency of this metal. show that an electron will not be emitted if a photon with a wavelength equal to 600 nm hits the metal surface.
Answer
1
Ruchira Das
Subject: Chemistry
, asked on 16/3/18
a hypothetical electromagnetic wave is shown in fig. 2.2. find out the wavelength of the radiation.
i cannot draw the wavelength here.....so given here half of crest is 2.16 pm
Answer
1
Pragnil Savjani
Subject: Maths
, asked on 14/3/18
general configuration and properties of d and f block elements
Answer
2
Anisha Mishra
Subject: Chemistry
, asked on 14/3/18
Definr yhe following:-
1.spectrum
2.emmission spectra
3.absorbtion spectra
Answer
1
Anisha Mishra
Subject: Chemistry
, asked on 14/3/18
PLz explain dual nature of electromagnetic radiation.
Answer
1
Ishika Sahay
Subject: Chemistry
, asked on 1/3/18
Kavita was playing a game with her friends. As a part of the game they ask her to express a wish. She said that she wanted to be able to see the atom. Atomic dimensions are from 10
-12
m and nucleus is 10
-15
m; visible range in the electromagnetic spectrum is for wavelengths in the range of 10
-7
m. As a student of chemistry.
Describe how the world would look for Kavita if she is granted her wish.
What values can you draw from this?
Answer
1
Roshni Sequeira
Subject: Chemistry
, asked on 25/2/18
how many electrons can have the following quantum numbers n=2, l= 1, ms= +1/2
Answer
1
Souhardya Mazumdar
Subject: Chemistry
, asked on 22/2/18
which radioactive isotope is used for calculatibg earth's age?- U
92
235
or Pb
82
206
?
Answer
1
Shreya Choudhary
Subject: Chemistry
, asked on 18/2/18
But KE does depend on brightness then what does the given line signifies?
Answer
1
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What are you looking for?
10. The number of electrons in Ca having minimum value of is.
(Consider only non-zero values of and m)
(A) 6 (B) 3 (C) 4 (D) None of these
Q. Calculate the number of radial nodes for :
Q. Among 2P, 3P and 4P, orbitals, which experiences lowest effective nuclear charge. Why?
i cannot draw the wavelength here.....so given here half of crest is 2.16 pm
1.spectrum
2.emmission spectra
3.absorbtion spectra
or Pb82206 ?