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4 years ago

10

Which elements have only one electron orbit or shell? A. hydrogen (H) and helium (He) B. helium (He) and lithium (Li) C. krypton

(Kr) and iron (Fe) D. hydrogen (H) and calcium (Ca)

1 answer:

mixer [17]4 years ago

5 0

2.1 Electrons, Protons, Neutrons, and Atoms

Hydrogen H 1

Helium He 2

Lithium Li 3

Beryllium Be 4

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