Beryllium typically seeks to complete its valence shell with how many electrons?

Beryllium typically seeks to complete its valence shell with how many electrons?

• A. 2
• B. 4
• C. 6
• D. 8

Answer: (B)

The concept here is that elements tend to complete their outermost shell to reach a stable configuration, typically an octet. Beryllium has two electrons in its valence shell (the outermost shell). To reach eight electrons in that shell, it would need six more electrons. So six is the number required to complete the valence shell. In practice, beryllium often achieves stability by losing its two outer electrons to resemble helium, but for completing the valence shell to an octet, the needed amount is six.

The concept here is that elements tend to complete their outermost shell to reach a stable configuration, typically an octet. Beryllium has two electrons in its valence shell (the outermost shell). To reach eight electrons in that shell, it would need six more electrons. So six is the number required to complete the valence shell. In practice, beryllium often achieves stability by losing its two outer electrons to resemble helium, but for completing the valence shell to an octet, the needed amount is six.