An element X on reacting with oxygen forms an oxide ` X_(2)O` . This dissovles in water and truns blue litmus red. State whether the element X is a metal or nonmetal.

(a) An element X on reacing with oxygen forms an oxide X_2O . The oxide dissolves in water and and turns bluw litmus red. Predict whether the element is metal or non metal. (b) A solution of copper sulphate was kept in an iron pot.After few days the pot developed some holes in it. How will you account for this?

An atom of element X contains 3 protons, 3 electrons and 4 neutrons: State whether element X is a metal or non-metal. Why?

An element reacts with oxygen to form an oxide which dissolves in dilute hydrochloric acid. The oxide formed also turns a solution of red litmus blue. Is the element a metal or a non-metal? Explain your answer.

An element X combines with oxygen to form an oxide XO . This oxide is electrically conducting. (a) How many electrons would be there in the outermost shell of the element X ? (b) To which group of the periodic table does the element X belong? (c) Write the formula of the compound formed when X reacts with chlorine.

An element X forms an oxide which turns red litmus blue. The element is a

A s-block element (M) reacts with oxygen to form an oxide of the formula MO_2 . The oxide is pale yellow in colour and paramagnetic. The element (M) is :

An element X makes an oxide with the formula X_2O_3 . This element will be in the same group as: