molecules elements and compounds

Differentiate between elements and compounds

Classify the substances given in Figure into elements and compounds.

Which compound, contain equal percentage of all elements in its compound-

State two differences between an element and a compound.

Assertion: Elements and compound are the examples of pure substances. Reason : The properties of a compound are different from those of its constituent elements.

The empirical formula and molecule mass of a compound are CH_(2)O and 180g respectivel. What will be the molecular formula of the compound?

Transition elements form binary compounds with halogens. Which of the following elements will form MF_(3) type compounds?

The weight of one molecules of a compound C_(60)H_(122) is

A reaction in which an element displaces another element from its compound

An element belongs to group II. What would be its valency ? Write the formulae of molecules of compounds it will form with elements in VA, VIA and VII A groups.