When alkali metals react with water, they form alkaline solutions and hydrogen gas. The reaction is exothermic. The reaction may be explosive hence carried out with some precautions to avoid accidents. Hydrogen gas is a colourless gas which burns with a pop sound.
Watch the video below and predict the trend of the rate of reaction and the position of the element in the periodic table.
In your note book arrange the elements from the least to the most reactive
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