Seudónimo Seudónimo

19-02-2021
Biology

contestada

What element has 1 valence electrons and 4 energy levels?

Respuesta :

karasimpson0204 karasimpson0204

19-02-2021

Answer:

Hydrogen and helium, both in the first period, have their valence electrons in the principal energy level n=1

Explanation:

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BrittneyP3321 BrittneyP3321

19-02-2021

Answer:

Hydrogen and Helium

Explanation:

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