How do you know the number of electrons in the outermost energy level of an atom?
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1 Answer
Nov 28, 2016
Based on the periodic table
Explanation:
You look at what group the element is. Only works for groups 1,2,13-17.
ex boron is in group 13, it has 3 valence elevtrons (outermost level)
Florine is in group 17, so 7 electrons in the outermost level. etc
