Chemistry
Grade-9
Easy
Question
When Be is converted into Be2+ it shows the configuration of which noble gas?
- Kr
- Ar
- He
- Xe
Hint:
When Be loses two electrons it has two electrons left.
The correct answer is: He
- Atomic number of Be is 4.
- It has four electrons and four protons.
- When Be loses two electrons it has two electrons left. It attains the configuration of He.
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