「鹼土金屬」修訂間的差異

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[[File:Be-140g.jpg|thumb|left|100px|鈹]]
[[File:Mg,12.jpg|100px|thumb|left|float|鎂]]
[[File:Ca,20.jpg|100px|thumb|left|float|鈣]]
[[File:Strontium.jpg|thumb|left|100px|鍶]]
[[File:Barium2.jpg|thumb|left|100px|鋇]]
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