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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.​

Respuesta :

The position of element A is first group i.e. alkali metals whereas element B belongs to other groups.

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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