Elements Compounds and Mixtures (by Deven)

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  • 1. Chemistry holiday homework Compounds, Elements and Mixtures
  • 2. Topics
    • Elements
    • Definitions
    • Examples
    • Compounds
    • Definitions
    • Examples
    • Mixtures
    • Definitions
    • Homogeneous Mixtures
    • Heterogeneous Mixtures
  • 3. ELEMENTS
  • 4. DEFINATIONS
    • An element is a substance which cannot be split up into two or more simpler substances by the usual chemical methods of applying heat, light or electric energy.
    • An element is a substance which is made up of only one kind of atoms.
    • Every substance in this world is made up of one or more elements.
  • 5. EXAMPLES
    • SODIUM
    • DIAMOND
    • CARBON
    • MERCURY
    • BROMINE
    • HYDROGEN
    • OXYGEN
  • 6. COMPOUNDS
  • 7. DEFINATIONS
    • A compound is a substance made up of two or more elements chemically combined in a fixed proportion by mass.
    • Compounds can be further divided into three classes on the basis of their properties:
    • a ) Acids
    • b ) Bases
    • c ) Salts
    • A compound cannot be separated into its components by physical methods.
    • The properties of a compounds are entirely different from those of its constituent elements.
    • The composition of a compound is fixed, the constituents are present in a fixed proportion by mass.
    • A compound has a fixed melting point, boiling point, etc.
    • Compound is a homogenous substance.
  • 8. EXAMPLES
    • Marble
    • Sodium Hydroxide
    • Common Salt
    • Water
    • Chalk
    • Copper Sulphate
  • 9. MIXTURES
  • 10. DEFINATIONS
    • A mixture is a substance ehich consists of two or more elements or compounds not chemically combined together.
    • All solutions are mixtures.
    • The various substances present in a mixture are known as “constituents of mixture” or “components of the mixture”.
    • Mixtures are of two types:
    • a) Homogenous Mixtures
    • b) Heterogeneous Mixtures
  • 11. Homogenous Mixtures
    • Those mixtures in which the substances are completely mixed together and are indistinguishable from one another are called homogenous mixtures.
    • All the homogenous mixtures are called solutions.
    • Eg.. Sea water, Soft drinks, Air, Petrol, etc.
  • 12. Heterogeneous Mixtures
    • Those mixtures in which the substances remain separate and one substance is spread throughout the other substance as small particles, droplets or bubbles, are called heterogeneous mixtures.
    • The suspension of solids in liquids are also heterogeneous mixture.
    • A mixture containing two (or more) immiscible liquids is also a heterogeneous mixture.
    • Eg.. Glass, Soil, Milk, Ink, etc.
  • 13. M a de By
  • 14.
    • DEVEN AHLAWAT
    • SHUBHAM CHAUDHARY
    • G.ABHISHEK
    • RITESH SAMANTA