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प्रश्न
An element X belong to 4th period and 17th group, state.
Write the formula of the compound formed when it reacts with `(27)/(13) y `
उत्तर
(iv) The element `(27)/(13) y ` has three electrons in its outermost shell which it can donate; hence, its valency is three. While the valency of bromine is
1. Thus, `(27)/(13) y ` can donate three electrons, and bromine can accept 1 electron to get the stable electronic configuration.
Therefore, the formula of the compound is AlBr3
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