What is the electron structure of a beryllium ion with a net ionic charge of +2?

Be²⁺: 1s²

Explanation:

The electron configuration is as follows:

Be: 1s²2s²

Be²⁺: 1s²

Be²⁺ ion has two electrons in the first shell. This is a stable electron configuration. The other stable electron configuration is an octet where there are eight valence electrons.  

The electron configuration of Be²⁺ is the same as that of He (helium). Helium is a noble or inert gas.  

Be²⁺ = He = 1s²

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