The Periodic Table
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Objective
I can explain the history and logic behind the Periodic Table of the Elements.
Part 1 of 3
Warm-up video
TED-Ed · 4:25Vetted channel
We don't generate video — this one is by TED-Ed on YouTube. The practice questions and exit ticket below were drafted by AI for this objective, and every question is editable in the teacher guide.
Part 2 of 3
Practice
7 questions
Explain why Mendeleev left gaps in his periodic table. What did these gaps represent?
How did Mendeleev's predictions about "eka-aluminum" (gallium) demonstrate the power and validity of his periodic table?
Part 3 of 3
Exit ticket
Quick comprehension check
“Explain how Mendeleev's periodic table was more than just a list of known elements. What key feature made it a powerful tool for predicting new elements? Describe how Mendeleev was able to predict the properties of undiscovered elements like gallium (eka-aluminum). What information did he use to make these predictions? ”
Sample answer included in the free materials
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