Some Basic Concepts of Chemistry Handwritten Notes | Chemistry Class 11 Chapter 1 | Some Basic Concepts of Chemistry Notes for Board Exams | STAR tube Notes

Chapter 1
Some Basics Concepts of Chemistry

Some Basic Concepts of Chemistry Best Handwritten Notes

Higher Secondary is the most crucial stage of school education because at this juncture specialized discipline based, content  ‐oriented courses are introduced. Students reach this stage after 10 years of general education and opt for Chemistry with a purpose of pursuing their career in basic sciences or professional

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Some Basic Concepts of Chemistry Handwritten Notes

Here you can get full Handmade Notes of Chemistry Class 11 Unit 1 Some Basic Concepts of Chemistry.

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Chemistry is defined as that branch of science which deals with the study of composition structure and properties of matter and change in matter under different conditions and the laws which defines these changes.

◆ Importance of Chemistry

◆ Nature of Matter

    ● Classification of Matter

        i) Physical Classification

       ii) Chemical Classification

◆ Atoms : It is the tiny particles of an element whose further division cannot be possible.

◆ Molecules : Molecules are the group of atoms which are tightly held together , chemically bonded together by a chemical reaction.

    ¡) Molecules of elements

   ¡¡) Molecules of compounds

◆ Physical Quantities

◆ Mass and Weight : Mass of a substance is the amount of matter present in it while weight is the force exerted by gravity on an object.

◆ Density : Density of a substance is it's amount of mass per unit volume.

◆ Temperature

◆ Accuracy : The closeness of measured value of the quantity with the true value is called accuracy.

◆ Precision : If the values of different measurements are close to each other and hence close to their average value , the measurement is said to be precise.

◆ Significant Figures

    ● Rules for determining the number of significant figures.

◆ Laws of Chemical Combination

    ¡) Law of Conservation of mass

   ¡¡) Law of Constant Composition or Definite proportions

  ¡¡¡) Law of Multiple Proportion

   ¡v) Law of Reciprocal Proportions

    v) Gay Lussac's Law of Gaseous Volumes

◆ Limitations of Dalton's atomic theory

◆ Modified Dalton's atomic theory [ Modern atomic theory]

◆ Avagadro's hypothesis/Law/Principle

◆ Application of Avogadro's law

◆ Atomic mass : The atomic mass of an element is the number of times an atom of that element is heavier than an atom of carbon taken as 12.

◆ Fractional Abundance

◆ Gram atomic mass : The atomic mass of an element expressed in grams is called gram atomic mass.

◆ Molecular mass : The molecular mass of a substance is the number of times the molecule of the substance is...

◆ Gram molecular mass

◆ Avogadro's number: Number of atoms present in one gram of atom.

◆ Mole Concepts

◆ Empirical Formula

◆ Molecular Formula

◆ Limiting Reactant/Reagent

◆ Molarity : It is defined as the number of moles of solute present per litre of the solution.

◆ Molality : It is defined as the number of moles of solute dissolve in 1 kg of the solvent.

◆ Mole Fraction

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