Ch 2 Chemistry Class 9
Important easy to understand Notes of Chapter No. 2: Ch 2 Chemistry Class 9 English Medium written by Professor Sulman Arif Suib. These notes are very helpful in the preparation of Chemistry for students of the 9th class Chemistry English Medium and these are according to the paper patterns of all Sindh Book Boards.
Summary and Contents:
Topics which are discussed in the notes are given below:
- How are cathode rays produced?
- Give the properties of cathode rays.
- Discuss the discovery of protons.
- Write the properties of protons.
- Discuss the discovery of neutron.
- Write the properties of neutrons.
- Define atomic number (Z) and mass number (A).
- Discuss the Rutherford gold metal foil experiment in the light of structure of atom.
- What are Rutherford postulates? Justify that Rutherford atomic model has defects.
- Explain How Bohr's atomic model is different from Rutherford atomic model?
- What are limitations of Bohr's atomic model?
- Prove that modern theory of De Broglie is related with Einstein and Planck's equation.
- Describe the Schrodinger atomic model.
- What is the shell? Explain the concept of shell( K, L, M,N, and O).
- Describe wave particle duality of electron of De Broglie hypothesis.
- Define Electronic configuration. Give maximum Electronic configuration of Shell and subshell.
- What are isotopes? discuss the isotopes of Hydrogen.
- Discuss the isotopes of Uranium, Chlorine, and Carbon.
- Write down the applications of isotopes in daily life.
- An atom has 5 electrons in M shell then: (i) Find out its atomic number? (ii) Write electronic configuration of atom. (iii) Name the element of atom.
- Write down the names of subatomic particles their masses in AMU and GM with their units charges.
- An atom has 3 electrons in L shell then: (i) Find out its atomic number? (ii) Write electronic configuration of atom. (iii) Name the element of atom.
- An atom has 2 electrons in K shell then: (i) Find out its atomic number? (ii) Write electronic configuration of atom. (iii) Name the element of atom.
- Multiple Choice Questions (MCQs) of Ch 2 Chemistry Class 9.