Which of these elements has a smaller atomic #? 1=Calcium 2=Beryllium 3= Xenon

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Beryllium has the smaller atomic number of 4.

Expert answered|ren15_05|Points 120|

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Asked 9/24/2011 1:41:29 PM

Updated 89 days ago|4/22/2026 10:10:51 PM

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Edited by yumdrea [4/22/2026 10:10:50 PM]

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