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Formulas of oxide and chloride of an ele...

Formulas of oxide and chloride of an element A are `A_(2)O_(5)` and `AC l_(3)` respectively. Which group of the mendeleev's periodic table will the element belong to? State whetehr it is a metal or a non-metal.

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Taking oxygen as standar, the valency of the element A is 5 and taking chlorine as standard, the valency of A is 3. since oxygen-based valency (B-chlorine-based valency) is same as that of the group number of the element. The element will be of group-VA in mendeleev's periodic table. thus, it is a non-metal.
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CHHAYA PUBLICATION-CLASSIFICATION OF ELEMENTS & PERIODICITY IN PROPERTIES-HIGHER ORDER THINKING SKILLS (HOTS) QUESTIONS
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