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22 May, 03:22

Which metal in Period 5 is very reactive and has two valence electrons in each atom? rubidium (Rb) strontium (Sr) zirconium (Zr) silver (Ag)

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  1. 22 May, 07:13
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    It should be Strontium having electronic configuration 2.8.18.8.2 or [Kr] 5S²
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