Seudónimo Seudónimo
  • 19-02-2021
  • Biology
contestada

What element has 1 valence electrons and 4 energy levels?

Respuesta :

karasimpson0204
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 BrittneyP3321
  • 19-02-2021

Answer:

Hydrogen and Helium

Explanation:

Answer Link

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