how can materials be classified based on their physical state?
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Answer:
CHEMICAL STATE ON THE BASIS OF PHYSICAL STATE MATTER CAN BE CLASSIFIED INTO THREE GROUPS; SOLIDS, LIQUIDS AND GASES. ON THE BASIS OF CHEMICAL STATE MATTER CAN BE CLASSIFIED INTO THREE GROUPS; ELEMENTS, COMPOUNDS AND MIXTURES. In other words, matter exists in three physical states : solid, liquid and gas.
Answer:
Chemists study the structures, physical properties, and chemical properties of material substances. These consist of matter, which is anything that occupies space and has mass. Gold and iridium are matter, as are peanuts, people, and postage stamps. Smoke, smog, and laughing gas are matter. Energy, light, and sound, however, are not matter; ideas and emotions are also not matter.
The mass of an object is the quantity of matter it contains. Do not confuse an object’s mass with its weight, which is a force caused by the gravitational attraction that operates on the object. Mass is a fundamental property of an object that does not depend on its location.In physical terms, the mass of an object is directly proportional to the force required to change its speed or direction. A more detailed discussion of the differences between weight and mass and the units used to measure them is included in Essential Skills 1 (Section 1.9). Weight, on the other hand, depends on the location of an object. An astronaut whose mass is 95 kg weighs about 210 lb on Earth but only about 35 lb on the moon because the gravitational force he or she experiences on the moon is approximately one-sixth the force experienced on Earth. For practical purposes, weight and mass are often used interchangeably in laboratories. Because the force of gravity is considered to be the same everywhere on Earth’s surface, 2.2 lb (a weight) equals 1.0 kg (a mass), regardless of the location of the laboratory on Earth.
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