Biology, 01.10.2019 04:00 leannaadrian
This element has 3 energy shells. the outer shell of this element was determined as illustrated here,
according to the periodic table of elements, it must be:
beryllium (1)
nitrogen (n)
argon (ai)
oxygen (0)
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This element has 3 energy shells. the outer shell of this element was determined as illustrated here...
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