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If a hypothesis can stand the test of repeated examination, it can become a _____. theory law observation experiment
asked
Sep 2, 2017
Chemistry
high-school
2
answers
0
votes
3.5k
views
When an oxygen atom forms an ion, it gains two electrons. What is the electrical charge of the oxygen ion? A. +2 B. -1 C. -2 D. +1
asked
Aug 5, 2016
Physics
high-school
2
answers
1
vote
81.4k
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