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Radioactive isotopes ranging from 11O to 26O have also been characterized, all short-lived. The longest-lived radioisotope is 15O with a half-life of 122.24 seconds, while the shortest-lived isotope is 12O with a half-life of 580(30)×10−24 seconds (the half-life of the unbound 11O is still unknown).
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Iron gains three electrons.
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The answer is A hope this helps
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the answer would be C of not C is B
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It should be silicon... I even googled it to see if I was correct and that’s what it says so can someone figure out why silicon is not an answer
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