Chemistry, 02.07.2019 17:30 kamiyaharris1
Which statement correctly describes an atom of the element helium? (9) a. an atom of helium has a full outer energy level and is therefore unusually reactive. b. an atom of helium has eight electrons in its outer energy c. an atom of helium has its valence electrons in its first energy level. d. an atom of helium most similarly behaves like an atom of hydrogen since it is in the same period.
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Which statement correctly describes an atom of the element helium? (9) a. an atom of helium has a f...
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