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O 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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O 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)

User Jeff Burka
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LITHIUM AND SODIUM BECAUSE THEY ARE BOTH METALS SODIUM IS AN EARTH METAL WHILE SODIUM IS AN ALKALINE EARTH METAL
User Ozzy Walsh
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C. Because they are in the same group, so they have the same number of valence (outer) electrons
User Avel
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