Answer: CESIUM

Possible questions:


Soft metal we know 2 Answers
Element in atomic clocks we know 1 Answer
Atomic number 55 we know 1 Answer
Element #55 we know 1 Answer
Soft, silvery-white element we know 1 Answer
Rare metallic element we know 1 Answer
Highly reactive metal we know 1 Answer
Atomic clock element we know 1 Answer

Similar Answers: