Periodictablewithatomicnumber electron confrugation
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Atom have 4 block s, p, d, f.
Hydrogen =1s¹
Helium =1s²
Lithium=2s¹
.....then process will follow but some are also exceptional.
Hydrogen =1s¹
Helium =1s²
Lithium=2s¹
.....then process will follow but some are also exceptional.
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