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2 November, 23:48

Which two elements will be the most alike and why?

a. Helium (He) and Hydrogen (H)

b. Oxygen (O) and Neon (Ne)

c. Lithium (Li) and Sodium (Na)

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Answers (1)
  1. 3 November, 00:10
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    C.) Lithium (Li) and Sodium (Na)

    Because they are in the same group (vertical rows) which means they have the same number of valence electrons and will react similarly.
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