When react with water, element A shows a mild explosion along with Hydrogen gases produced. Meanwhile, element B shows a spark of fire and duced less Hydrogen gases. Predict the position of element A and B in the periodic table using reactivity trends.

It is because alkali metals reacts violently with water that leads to little explosion and also produced hydrogen gas while on the other hand, element B belongs to next groups in the periodic table. The reactivity of element A is higher than element B due to lack of one electron in the outermost shell which make it highly reactive as compared to element B which is less reactive in nature.

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When react with water, element A shows a mild explosion along with Hydrogen gases produced. Meanwhile, element B shows a spark of fire and duced less Hydrogen gases. Predict the position of element A and B in the periodic table using reactivity trends.​

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When react with water, element A shows a mild explosion along with Hydrogen gases produced. Meanwhile, element B shows a spark of fire and duced less Hydrogen gases. Predict the position of element A and B in the periodic table using reactivity trends.