Changes

== Reactivity ==

== Reactivity ==

Caesium is extremely reactive in air and water. Caesium rapidly oxidizes in air and can spontaneously combust<ref>{{Cite web|url=https://www.compoundchem.com/2019/08/06/iypt055-caesium/|title=IYPT 2019 Elements 055: Caesium: Atomic clocks and explosive reactions|last=Interest|first=Compound|date=2019-08-06|website=Compound Interest|language=en-GB|access-date=2019-11-13}}</ref> (randomly catch on fire) at any moment. For this reason, it [http://www.chemistryexplained.com/elements/A-C/Cesium.html must be stored in] [[kerosene]] or a [[Oil|mineral oil,]] like other group one elements ([[Lithium|Lithium,]] [[Sodium|Natrium]], [[Rubidium]], and [[Francium]].) In water, Caesium violently reacts to make Caesium Hydroxide (2CsOH).<ref>{{Cite web|url=https://www.webelements.com/caesium/chemistry.html|title=WebElements Periodic Table » Caesium » reactions of elements|website=www.webelements.com|access-date=2019-11-13}}</ref>  The Caesium sinks for about one second, then explodes. The explosion is over 50 times the size of the size of the element dropped in the water, and the explosion is enough to break a common Pyrex [[Beaker]], [[Flask]], or [[Test tube|Test Tube]].  You can find a video of the reaction [https://www.youtube.com/watch?v=5Vd5pqjbWJU here.]

Caesium is extremely reactive in air and water. Caesium rapidly oxidizes in air and can spontaneously combust<ref>{{Cite web|url=https://www.compoundchem.com/2019/08/06/iypt055-caesium/|title=IYPT 2019 Elements 055: Caesium: Atomic clocks and explosive reactions|last=Interest|first=Compound|date=2019-08-06|website=Compound Interest|language=en-GB|access-date=2019-11-13}}</ref> (randomly catch on fire) at any moment. For this reason, it [http://www.chemistryexplained.com/elements/A-C/Cesium.html must be stored in] [[kerosene]] or a [[Oil|mineral oil,]] like other group one elements ([[Lithium]], [[Sodium|Natrium]], [[Rubidium]], and [[Francium]].) In water, Caesium violently reacts to make Caesium Hydroxide (2CsOH).<ref>{{Cite web|url=https://www.webelements.com/caesium/chemistry.html|title=WebElements Periodic Table » Caesium » reactions of elements|website=www.webelements.com|access-date=2019-11-13}}</ref>  The Caesium sinks for about one second, then explodes. The explosion is over 50 times the size of the size of the element dropped in the water, and the explosion is enough to break a common Pyrex [[Beaker]], [[Flask]], or [[Test tube|Test Tube]].  You can find a video of the reaction [https://www.youtube.com/watch?v=5Vd5pqjbWJU here.]

==References==

==References==

{{Periodic Table}}

{{Periodic Table}}

 

[[Category:Alkali metals]]

[[Category:Alkali metals]]

[[Category:Chemical elements]]

[[Category:Chemical elements]]