Which element is placed in the same period as ruthenium but has a higher atomic number than it?
Answer
A
bismuth
B
osmium
C
zirconium
D
silver
Explanation
Ruthenium (Ru) has atomic number 44 and is in period 5. Silver (Ag) is also in period 5 and has the higher atomic number 47, so the correct choice is silver.
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