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Which of these elements do not have atoms whose outer shells are full of electrons? A) neon B) argon C) radium D) krypton
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Which of these elements do not have atoms whose outer shells are full of electrons?

A) neon
B) argon
C) radium
D) krypton

User Machinery
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1 Answer

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The answer is radium. Recall that all of the elements with full electron shells are on the column to the farthest right on the periodic table. These are known as Noble Gases, and are nonreactive.
User Bendik Knapstad
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