Page 26 - CLass 9 Learning Outcome

Students should be able to understand the structure of atom, the electronic configuration of the various elements, the contributions of different scientists in understanding the structure of atom.

16. Apply the concept of mole in terms of

mass and number of particles. 17. Apply the concept of mole in terms of mass and number of particles. 1. Analyse Thomson’s model of an atom. 2. Critically analyse alpha scattering experiment by comparing with the previous proposed model of atom. 3. Compare the properties of the sub-atomic particles. 4. Explain the observations of alpha scattering experiment in detail along with the supporting reasons. 5. Explain Bohr's model of an atom and critical

1. Comprehend the existence of various

sub atomic particles. 2. Explain Thomson's and Rutherford's model of an atom. 3. Explain Bohr’s model of an atom. 4. Understand the distribution of various electrons in shells. 5. Comprehend the concept of valency. 6. Write the electronic configurations of first twenty elements along with their valency with explanation. 7. Explain atomic number and mass number. 8. Differentiate between isotopes and isobars. 9. Discuss th

Structure of atom