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.

Given that calcium reacts with chlorine to form a compound of the formula CaCl_(2) . Predict the formmula of the product of the reaction between magnesium and chlorine.

An element 'X' burns in oxygen to form an electrovalent compound XO. State the compounds you expect it will form if the element X is made to combine with (i) chlorine and (ii) sulphur. Mention the chemical formula and nature of bond present in each case.

Study the given table: X and Y combine to form a compound of formula:

Which element forms a compound with the formula H_(3)XO_(4) ?

In a combination reaction two elements combine to form a compound .

An element E combines with oxygen to form an oxide E_(2)O which is a good conductor of electricity. Give the following information: (i) How many electrons will be present in the valence shell of the element E ? (ii) Write the formula of the compound formed when the element E combines with chlorine.