Question

Question #05cb7

Answer 1

`"Cs"`

Explanation:

Cesium is an element located in period 6, group 1 of the periodic table and has `"Cs"` as its chemical symbol.

![https://www.britannica.com/science/cesium]()

Cesium is so reactive that it must be handled under inert gases. Moreover, the metal is usually kept in vacuum-sealed ampoules made from borosilicate glass.

![http://onyxmet.com/?route=product/category&path=69_119]()