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Because it has only one valence electron, rubidium is very reactive, especially with water. It has 37 electrons which tells you that it has quite a lot of energy. So, if it contacts water the reaction would be very energetic. The H2O molecules are broken apart and the rubidium bonds with the oxygen. The heat released during this exothermic reaction will ignite the hydrogen that was released from the water.

Boom!

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13y ago

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