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An atom of element X has one more shell of electrons than an atom of beryllium, but it has one less valence electron than beryllium. Which element is element X?
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An atom of element X has one more shell of electrons than an atom of beryllium, but it has one less valence electron than beryllium. Which element is element X?

User Olalekan Sogunle
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3 votes

Answer:

sodium

Step-by-step explanation:

User Vfioox
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Element X is sodium. Sodium has one less valence electron than beryllium and it has the electron configuration of 2,8,1, thus it has one more shell of electrons.
User Integer Poet
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