CBSE Class 10 Answered
Explain the formation of CaF2.
Asked by Topperlearning User | 24 Jul, 2017, 02:20: PM
Expert Answer
Atomic Number of Ca is 20.
Electronic Configuration of Ca : 2, 8, 8, 2
When Calcium loses two electrons, it becomes Ca2+ and attains stable electronic arrangement of argon.
Now,
Ca → Ca2+ + 2e-
Atomic Number of F = 9
Electronic Configuration of F : 2, 7
Fluorine on gaining one electron forms an anion F- and attains stable electronic arrangement of neon.
F + e- → F-
The oppositely charged ions are held together by strong electrostatic forces of attraction as shown :-
Answered by | 24 Jul, 2017, 04:20: PM
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