ICSE Class 11 Chemistry — Flashcards for Quick Revision

A: Matter is anything that has mass and occupies volume. Physical classification of matter is based on state: solids, liquids, and gases. Solids have definite shape and volume, liquids have definite volu

A: An element is a pure substance that cannot be broken into simpler substances by ordinary physical or chemical methods. A compound is a pure substance formed by chemical combination of two or more diff

A: In a homogeneous mixture, the components are uniformly distributed throughout the sample. In a heterogeneous mixture, the components are not uniformly distributed and different parts may have differen

A: Matter was composed of extremely small particles called atoms which were structureless, possessed fixed mass and were indivisible. Atoms of a given element were alike and differed from atoms of other

A: Cathode rays are streams of electrons. They travel in straight lines, produce fluorescence, and get deflected towards the positive electrode in an electric field, showing that they are negatively char

A: The charge-to-mass ratio was found to be 1.759 × 10^8 C/g in 1897. This was measured using cathode rays and showed that the same particle was present regardless of the gas used.

A: A periodic table is an arrangement of all the known elements, based on periodic law, in a manner that elements with similar properties fall in the same vertical column called a group.

A: The physical and chemical properties of the elements (as well as the formulae and properties of their compounds) are the periodic functions of their atomic weights (atomic masses).

A: Mendeleev classified elements on the basis of their atomic weights and periodicity in physical and chemical properties.