An atom symbol, a cross-section of a layered sphere, a document with a grid, and a balance scale.

Can you handle the atomic weight of a perfect score on this isotopes quiz today?

Difficulty

Hard

Questions

Volts

3/q

Same protons, different neutrons—keep up or get left behind. From Carbon-14 dating to the stability of Lead-208, the atomic mass is shifting. Can you spot the radioactive outliers? Prove you know the nucleus better than the rest. The clock is ticking. Play now.

More ZapStacks in Inside the Atom

A large cluster of spheres breaks apart, with smaller groups, a single sphere with an arrow, and wavy lines moving away from the center.

Alpha, Beta & Gamma Radiation

Protons, Neutrons & Electrons

25 Zaps · Medium