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Virat

Asked: September 9, 2026In: Class 9 Science

You want to design a new ionic compound, where the total positive charge is 6+ and the total negative charge is 6-. Which of the following combinations gives the correct number of ions? (i) 2 Al3+ and 3 Cl- (ii) 3 Mg2+ and 1 PO4 3- (iii) 2 Fe3+ and 3 O2- (iv) 3 Ca2+ and 2 SO4 2-

The correct option is (iii). Two Fe3+ ions provide a total positive charge of 6+ and three O2- ions provide a total negative charge of 6-, making the combination neutral and fully balanced.

Virat

Asked: September 9, 2026In: Class 9 Science

A particular element A has one electron in its third shell. There is another element B with six electrons in its second shell. (i) How many electrons does A tend to give or take to become stable? (ii) What kind of ion would it form? (iii) How many electrons does B tend to give or take to become stable? (iv) What kind of ion would it form? (v) If A and B were to combine, what kind of bond would be formed? (vi) What would be the formula for the compound thus formed?

Element A loses one electron to form a unipositive cation A+. Element B gains two electrons to form a dipositive anion B2-. They combine through an ionic bond to form the compound A2B.

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