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Question
Write the electron configuration and determine the valency of the beryllium -atomic number 4 and oxygen - atomic number 8.
Short Answer
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Solution
Beryllium (Atomic No. 4)
- Electron Configuration: 2, 2
- Valency: 2 (It loses 2 electrons to become stable).
Oxygen (Atomic No. 8)
- Electron Configuration: 2, 6
- Valency: 2 (It needs to gain 2 electrons to complete its octet).
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Chapter 2: Periodic Classication of Element - Answer the Following [Page 35]
