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https://chem.libretexts.org/Bookshelves/Inorganic_Chemistry/Supplemental_Modules_and_Websites_(Inorganic_Chemistry)/Descriptive_Chemistry/Elements_Organized_by_Block/1_s-Block_Elements/Group__2_Elements%3A_The_Alkaline_Earth_Metals/1Group_2%3A_Chemical_Reactions_of_Alkali_Earth_Metals/Reactions_of_Group_2_Elements_with_Water<br>  (26.06.24)

https://www.rsc.org/periodic-table/element/38/strontium<br> (26.06.24)

https://de.wikipedia.org/wiki/Erdalkalimetalle<br> 

https://www.gutefrage.net/frage/warum-heissen-die-elemente-der-2hauptgruppe-erdalkalimetalle</p> (26.06.24)

https://www.santosgrills.de/grill-magazin/tipps_und_tricks/silvestergrillen-als-geselliger-jahresausklang/</p> (26.06.2024)