Periodic Table Trivia
Test your mettle with elements—from gallium’s quirky melt to helium’s party float—if you can handle the periodic punch, you’re a real element pro.
EXAMPLE QUESTIONS
What is the atomic number of iron, the transition metal central to hemoglobin and steel?
26
Which gas is typically used in party balloons so they float at celebrations?
Helium
In 1913, Henry Moseley’s X-ray studies prompted chemists to reorder the periodic table by what fundamental property?
Atomic number
Which element’s 1875 discovery matched Mendeleev’s predicted “eka‑aluminum,” confirming the periodic table’s predictive power?
Gallium
At about 25°C, what state of matter is the reddish-brown halogen bromine in?
Liquid