Electronic configuration of the elements
1.Helium
2.boron
3.nitrogen
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Answer: helium : 1s^2
Boron : atomic number is 5 so 1s^2 2s^2 2p^1 (2,3)
Nitrogen : atomic number is 7 so 1s^2 2s^2 2p^3 (2,5)
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❤.HELIUM:
1s2
❤.BORAN
1s2,2s2,2p1
❤.NITROGEN
1s2,2s2, 2p2.
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