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lisabon 2012 [21]
3 years ago
6

NEWWWW SORRY FOR A BIT OF READING ,

Chemistry
2 answers:
AVprozaik [17]3 years ago
8 0

Answer:

I think It Is B

Explanation:

NemiM [27]3 years ago
5 0
The answer is D. The number of valence electrons in the unknown element
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