When sodium touches water, it reacts vigorously, producing hydrogen gas and sodium hydroxide. The reaction can indeed cause fizzing due to the release of hydrogen gas. Additionally, the heat generated from the reaction can ignite the hydrogen, potentially leading to an explosion or a fire if enough hydrogen accumulates. The reaction is exothermic, meaning it releases heat, and this can cause the sodium to melt and move rapidly on the water's surface.
So, while the initial reaction might be described as fizzing, it can also lead to explosive results if the conditions are right. Therefore, "it fizzes" is partially correct, but "it explodes and smokes" can also occur under certain circumstances. "It turns a different color" is not typically an accurate description of the immediate reaction.
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