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Potassium is the most reactive. All of the elements in the first column of the Periodic Table are extremely reactive to water. These elements all have on more electron than the stable noble gas configuration (an octet in the valence shell), and so by getting rid of that extra valence electron, the element becomes much more stable. In contact with water, these elements will give this extra electron off to the water, forming hydroxide (OH-) and becoming a positive ion. For example, when you add potassium metal (K) to water, you will form the positive ion K+, which has the same electron configuration as argon, with a completely filled valence shell. The other metals listed will not react very quickly at all with water (unless it is very acidic water).

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βˆ™ 2007-05-16 19:18:20
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Q: Which of these metals silver iron magnesium potassium or zinc will give the most violent reaction with water and why?
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