#digitalkemistry

What is the main distinction between ionic and covalent bonds? Explain with suitable examples.

What is the main distinction between ionic and covalent bonds? Explain your answer with suitable examples. ANSWER : Ionic Bond : The bond formed by the complete transfer of electrons from one atom to another is called an ionic bond. Its also known as Electrovalent Bond. CONDITIONS FOR IONIC BOND:  Following are the conditions that …

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Write a note on the Covalent bond?

Write a note on the Covalent bond? ANSWER: COVALENT BOND: INTRODUCTION: G.N Lewis proposed that atoms could attain stable electronic configuration by sharing electrons between them. Covalent Bond Definition:  The bond which is formed by the mutual sharing of electrons is called a covalent bond.  REPRESENTATION OF COVALENT BOND: The shared pair of electrons are …

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Explain the two concepts, which explain the chemical bonding?

Explain the two concepts, which explain the chemical bonding? ANSWER:    Chemical bonding is explained with the help of two important concepts. The Valence Concept The Orbital Concept The Valence Concept (Electric theory of valence) INTRODUCTION:       In 1916, G.N Lewis and W. Kossel presented the electronic theory of valence. STATEMENT:  It states that “In a …

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Gas Discharge Tube Experiment | Discovery of Cathode rays

Discharge tube Experiment (William Crooks Experiment) (Discovery of Electrons / Cathode rays)  Gases are bad conductors of electricity but it is observed that at low pressure they conduct electricity. For this William purpose Crooks developed a discharge tube or cathode ray tube. The gas discharge tube consists of : 1. Cylindrical glass tube 2. Two …

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Planck’s Quantum Theory of Radiation| Black body radiation

Planck’s Quantum Theory of Radiation: In 1900, a German Physicist Max Planck had studied radiations emitted by hot black bodies and presented the results of his famous black body radiations experiments, which showed that light has a dual character, behaving like a particle as well as a wave. He gave the quantum theory of radiation …

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Charle’s Law – Gas Law Chemistry Notes

Charle’s Law: Jacques Charles, in 1662, gave this law. It relates the volume and absolute temperature of ideal gases at constant pressure and mass. It states “For a fixed mass of a gas, the volume is directly proportional to absolute temperature at constant pressure.” V         ∝        T          …………….. (1) This shows that when absolute temperature …

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Bohrs atomic model

Bohr’s Atomic Model ( Main Postulates) – Chemistry Notes

Bohr’s Atomic Model: (Bohr’s atomic model for hydrogen atom) Neils Bohr’s, 1913 proposed a model of an atom based on the planks quantum theory of radiation. Main Postulates of Bohr’s theory: The basic postulates of Bohr’s theory are: An atom consists of small, heavily positively charged nucleus around which electrons revolve in definite circular paths …

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Rutherford’s Atomic Model (Gold Foil Experiment) – Chemistry Notes

Rutherford’s Atomic Model Rutherford,1911 performed an experiment in order to find the arrangement of electrons and protons in an atom. Rutherford’s Gold Foil Experiment Rutherford bombarded a very thin gold foil about 0.00004 cm thickness with alpha particles. Alpha particles were obtained from the disintegration of polonium. Alpha particles are helium nuclei. i.e. He ++ …

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Boyle’s Law | Gas Law – State of matter Gases

Boyle’s Law: Robert Boyle, in 1662, gave this law. It relates the pressure and volume of ideal gases at constant temperature and mass. It states “For a fixed mass of a gas, the volume is inversely proportional to the pressure at a constant temperature.”     Thus law can also be stated as: “For a fixed mass …

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