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Write the electronic configuration of any one pair of isotopes and isobars.
Answer
- Isotopes are elements having the same atomic number but different mass numbers.
Example, and
Mass number = 35 Mass number = 37
Atomic number = 17 Atomic number = 17
Number of electrons = atomic number = 17 Number of electrons = atomic number = 17
Electronic configuration - 2, 8, 7 Electronic configuration - 2, 8, 7
K Shell - 2 electrons K Shell - 2 electrons
L Shell - 8 electrons L Shell - 8 electrons
M Shell - 7 electrons M Shell - 7 electrons
Since isotopes have the same atomic number, their electronic configuration is the same.
- Isobars are elements having different atomic numbers but same mass numbers.
For example: and
Mass number = 40 Mass number = 40
Atomic number = 20 Atomic number = 18
Number of electrons = atomic number = 20 Number of electrons = atomic number = 18
Electronic configuration - 2, 8, 8, 2 Electronic configuration - 2, 8, 8
K Shell - 2 electrons K Shell - 2 electrons
L Shell - 8 electrons L Shell - 8 electrons
M Shell - 8 electrons M Shell - 8 electrons
N Shell - 2 electrons
Since isobars have different atomic numbers, their electronic configuration is different.
