Can you name the element that is used in atomic clocks to tell the time?

Cesium atoms resonate, or vibrate, at a precise rate. One second is currently defined as 9,192,631,770 cycles of radiation needed for a cesium atom to vibrate. This method is so precise that an atomic clock only loses a single second in 100 million years.

Asked by Brian Edwards · Last updated 5 years ago · 4.1K views · SOURCE