Which one of the following elements is likely to exhibit the most violent and rapid reaction with water? A)Na B)Rb C)Mg D)Sr E)Cl ₂

Question

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Rb (rubidium) is in Group 1 of the periodic table, which means it has only one valence electron that it wants to get rid of. This makes it highly reactive with water, leading to a violent and rapid reaction. Mg (magnesium) and Sr (strontium) are both in Group 2 and are less reactive than Group 1 elements. Na (sodium) is also in Group 1 but is less reactive than Rb. Cl (chlorine) is a non-metal and does not react violently with water.

Which One of the Following Elements Is Likely to Exhibit