Chemistry
Grade-9
Easy

Question

When Be is converted into Be2+ it shows the configuration of which noble gas?

  1. Kr
  2. Ar
  3. He
  4. Xe

hintHint:

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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