ellarobertson84 ellarobertson84

07-01-2021
Chemistry

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which element has two valence electrons in the s sublevel of the fourth energy level

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riyamshnawa riyamshnawa

07-01-2021

The element is americium, a metal from the actinides. The element is in Period 4 and Group 2. Even though the 4s sublevel is filled, the last electron went into that sublevel, making it a member of the s-block. It has 2 valence electrons.

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