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alexiswells alexiswells
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6 years ago
How many elements are there in period 3?
 a. 2 c. 8
  b. 6 d. 18
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dthomas18dthomas18
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6 years ago
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alexiswells Author
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6 years ago
Thanks for your help!!
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Yesterday
Smart ... Thanks!
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2 hours ago
Good timing, thanks!
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