Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Electron scattering wikipedia , lookup
Future Circular Collider wikipedia , lookup
ATLAS experiment wikipedia , lookup
Compact Muon Solenoid wikipedia , lookup
ALICE experiment wikipedia , lookup
Grand Unified Theory wikipedia , lookup
Strangeness production wikipedia , lookup
Identical particles wikipedia , lookup
Standard Model wikipedia , lookup
Dark matter wikipedia , lookup
THE HERITAGE SCHOOL CHEMISTRY SUPPLEMENT- 1 CLASS- VII CHAPTER- MATTER Matter :Anything that has mass,occupies space and can be perceived by our senses is called matter.example:sugar,water,gold, nitrogen. The quantity of matter that a body contains is called mass. The space occupied by a body is called volume. Composition of matter:Matter is composed of small particles –molecules,atoms or ions. Concept of atoms and molecules: Atom is the smallest particle of matter which may or may not exist independently but exhibits all the properties of matter. Molecule is the smallest particle of matter which exist independently and exhibits all the properties of matter. Characteristics of particles of matter: 1. All matter is made up of minute particles called atoms or molecules which are in a continuous random motion. 2. Particles of matter have space between them called intermolecular space .This space is minimum in solids and maximum in gases. 3. There exists a force of attraction between the particles which is known as intermolecular force of attraction.this force of attraction is maximum in solids and minimum in gases. All matter exists in three states generally-solid ,liquid,gas. Interconversion of states of matter. Interconversion of states of matter is the process by which matter changes from one form to another and back to the original state without any change in its chemical composition,when conditions are changed. Cause of change of state: 1.change of temperature 2.change of pressure.