Periodic Table Periods Quiz

Can you identify which period each element belongs to? Test your knowledge of the horizontal rows in the Periodic Table!

Quiz Options
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Quick Tips
  • • Period = horizontal row on the periodic table
  • • Elements in the same period have the same number of electron shells
  • • Properties trend across a period

Welcome to the Periodic Table Periods Quiz!

Test your knowledge of element periods in the periodic table.

Select your quiz options and click "Start Quiz" to begin.

Sample Questions:

• Which period does Lithium (Li) belong to? Period 2

• Which period does Argon (Ar) belong to? Period 3

Question 1/10 Score: 0
Difficulty: Medium

Which period does Lithium (Li) belong to?

Quiz Completed!

Your Score: 8/10 (80%)

Great job! You know your periodic table well.

Correct vs Incorrect
Performance by Period

Last Updated: Aug 17, 2025

Improved with clearer section comments for each period, notes on the special cases of La/Lu and Ac/Lr, and better organization while keeping the original data format (symbol, name, period, atomic number).