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08-02-2021
Chemistry

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The electron configuration of an element is 1s22s2. How many valence electrons does the element have? (1 point) a 1 b 2 c 3 d 4

Respuesta :

14-02-2021

Answer:

b

Explanation:the shell is 2 so ignore the 1s electrons it is only the level 2 electrons that are valence

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