Multiple choice general knowledge

Name the metal used in atomic clock?

  1. Polonium

  2. Radium

  3. Aluminum

  4. Ceisium

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cesium (spelled Ceisium in the question, a typo) is used in atomic clocks because of its stable vibration frequency when exposed to microwave radiation. This property makes it ideal for precise time measurement. The other elements listed are radioactive or have different applications.