which metal in period 5 is very reactive and has two valence electrons in each atom?\no rubidium (rb)\no…

which metal in period 5 is very reactive and has two valence electrons in each atom?\no rubidium (rb)\no strontium (sr)\no zirconium (zr)\no silver (ag)

which metal in period 5 is very reactive and has two valence electrons in each atom?\no rubidium (rb)\no strontium (sr)\no zirconium (zr)\no silver (ag)

Answer

Answer:

B. strontium (Sr)

Brief Explanation:

Strontium is in Period 5, is a metal, highly reactive, and has 2 valence - electrons as an alkaline - earth metal. Rubidium has 1 valence electron. Zirconium and silver have more complex valence electron configurations and are less reactive compared to strontium in the context of this question.