Science
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Chapter 4: Structure of Atom
Class: IX
Exercise number 53
Question 1
For the symbol H, D and T tabulate three sub - atomic particles found each of them.
Answer 1
|
Symbol |
Proton |
Neutron |
Electron |
|
H |
1 |
0 |
1 |
|
D |
1 |
1 |
1 |
Question 2
Write the electronic configuration of any pair of isotopes and isobars.
Answer 2
Two isotopes of carbon are 12C and 14C
The electronic configuration of 12C is 2, 4.
The electronic configuration of 14C is 2, 4.
[Isotopes have same electronic configuration]
4029Ca and 4018Ar are a pair of isobars
The electronic configuration of 4029Ca is 2, 8, 8, 2
The electronic configuration of 4018Ar is 2, 8, 8.
[Isobars have different electronic configuration]
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