5
QuizMultiple Choice

The History and Arrangement of the Periodic Table

Question 5 • CA-Chemistry A

Which element is placed in the same period as ruthenium but has a higher atomic number than it?

Answer
A
bismuth
B
osmium
C
silver
D
zirconium

Explanation

Ruthenium (Ru) is in period 5 and has atomic number 44. Silver (Ag) is also in period 5 and has atomic number 47, which is higher than 44. Osmium and bismuth are in period 6, while zirconium is in period 5 but has a lower atomic number.

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