An element `(X)` forms compounds of the formuls `XCl_(3),X_(2)O_(5)` and `Ca_(3)X_(2)` , but does not form `XCl_(5)`. Which of the following is the element X ?

An element 'X, forms compounds of the formula XCl_(3),X_(2)O_(5)& Ca_(3)X^(2) but does not form XCl_(5) , which of the following is the elements (X) :-

An element 'X, forms compounds of the formula XCl_(3),X_(2)O_(5)& Ca_(3)X^(2) but does not form XCl_(5) , which of the following is the elements (X) :-

An element forms compounds of the type MCl_(3), M_(2)O_(5) and Ca_(3)M_(2) but does not form MF_(5) . The element could be :

A compound with the formula X_(2)O_(5) contains 34.8% oxygen by mass. Identify element X.

An element X reacts with chlorine to form a compound of formula XCl_(2) . Write the formulae of compounds which you expect to be formed when the element X combines with oxygen.

Element X forms five stable oxides with oxygen of formula X_(2) O, XO , X_(2) O_(3) , X_(2) O_(5) . The formation of these oxides explains