|
Draw a diagram of Bohr's model of an atom
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1
|
3304
|
November 26, 2016
|
|
Why do isotopes of an element show similar chemical properties?
|
|
1
|
3014
|
November 26, 2016
|
|
Will ${}_{35}Cl$ and ${}_{37}Cl$ have different valencie
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|
1
|
1014
|
November 26, 2016
|
|
Write one pair of isobars
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|
1
|
1926
|
November 26, 2016
|
|
An element has 6 electrons in its M-shell
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1
|
5648
|
November 26, 2016
|
|
How many neutrons are present in B and D?
|
|
1
|
905
|
November 26, 2016
|
|
An atom contains 3 protons, 3 electrons and 4 neutrons
|
|
1
|
8163
|
November 26, 2016
|
|
Tabulate the two sub-atomic particles present in the nucleus of each of them
|
|
1
|
600
|
November 26, 2016
|
|
Number of protons, neutrons and electrons
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|
1
|
2914
|
November 26, 2016
|
|
Atomic number of aluminium is 13 and mass number is 27
|
|
1
|
5478
|
November 26, 2016
|
|
What are the mass numbers of A and B?
|
|
1
|
1077
|
November 26, 2016
|
|
The atom of an element has 9 protons, 9 electrons and 10 neutrons
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|
1
|
4766
|
November 26, 2016
|
|
Determine the valency of oxygen and sulphur
|
|
0
|
1890
|
November 26, 2016
|
|
What is the atomic number of the element?Identify the element
|
|
1
|
464
|
November 26, 2016
|
|
For the following statements, write T for True and F for False
|
|
1
|
3109
|
November 26, 2016
|
|
Why do different elements emit different flame colours when heated by the same non-luminous flame?
|
|
0
|
3017
|
October 19, 2016
|
|
Whether the electron pairs up in the same p-orbital or will it go to the next p- orbital?
|
|
0
|
938
|
October 19, 2016
|
|
Is it possible to find exact position of electron ? How do you find the position and velocity of an electron?
|
|
0
|
1170
|
October 19, 2016
|
|
Why is the electron in an atom restricted to revolve around the nucleus at certain fixed distances?
|
|
0
|
1676
|
October 19, 2016
|
|
What does line spectrum tell us about the structure of an atom?
|
|
0
|
786
|
October 19, 2016
|
|
Variety of colours is seen from fire works. How do these colours come from fire works?
|
|
0
|
492
|
October 19, 2016
|
|
Do you observe any other colour at the same time when one colour is emitted?
|
|
0
|
1253
|
October 19, 2016
|
|
What happens when you heat an iron rod on a flame?
|
|
1
|
7208
|
October 19, 2016
|
|
How do vibrating electric and magnetic fields around the charge become a wave that travel through space?
|
|
0
|
1624
|
October 19, 2016
|
|
Why is an atom of one element different from the atoms of other elements?
|
|
0
|
940
|
October 19, 2016
|
|
Do all atoms have the same sub-atomic particles?
|
|
0
|
1350
|
October 19, 2016
|
|
How do the sub-atomic particles coexist in an electrically neutral atom?
|
|
0
|
2109
|
October 19, 2016
|
|
Complete the electronic configuration of the following elements
|
|
0
|
8100
|
October 19, 2016
|
|
Write an activity which shows metal produce colour in flame
|
|
0
|
3434
|
October 19, 2016
|
|
Explain the wave nature of light
|
|
0
|
733
|
October 19, 2016
|