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The columns in the periodic table are also called A. sets. B. periods. C. families. D. energy levels
asked
Jun 8, 2017
Chemistry
high-school
2
answers
0
votes
173k
views
In addition to factory work, many women in the USSR were employed
asked
Jan 20, 2017
History
high-school
2
answers
5
votes
102k
views
Marita runs clockwise around a track in 40 seconds. Jill leaves from the same point, but runs counter clockwise. She meets Marita every 15 seconds. How long does it take Jill to run around the track
asked
Mar 5, 2016
Mathematics
high-school
1
answer
4
votes
24.6k
views
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