Which element has the same number of valence electrons as rubidium. A. lithium
B. argon
C. calcium
D. iron

To know if elements have the same number of valence electrons you can look at what group they are in on the periodic table. Rubidium (Rb) is in group one which means it will have the same number on valence electrons as Lithium (Li) because Lithium is also in group one on the periodic table. I hope this helps!!

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