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Name: ____________________________________________ Period: _______________
Using your supplied Periodic Table, please write the correct Electron configuration and number of valence electrons for the following elements. REMEMBER TO EXPAND LAST SUBENERGY LEVEL INTO ORBITALS.
Element #1 (As, Arsenic) Electron configuration:
# of valence electrons: _______
Element #2 (Zr, Zirconium) Electron configuration:
# of valence electrons: NA - bc in D block
Element #3 (S, Sulfur) Electron configuration:
# of valence electrons: _______