Ch 3 Chemistry Class 9
Important easy to understand Notes of Ch 3 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:
- State Dobereiner's triad with two examples.
- State Newland law of octaves with examples.
- State Mendeleev periodic law.
- When and by whom modern periodic able was proposed. Also state the law.
- Define periods in Periodic Table. Also discuss the period in modern periodic table.
- Define Groups in Periodic Table. Give properties of each group of modern periodic table.
- Distinguish between periods and groups
- Discuss in detail the long form of periodic table.
- Define Atomic Radius. How it increases and decrease. Also give example.
- Define Ionization energy. How it increases and decrease. Also give example.
- Define electron affinity. How it increases and decrease. Also give example.
- Define shielding effect. How it increases and decrease and also give example.
- Define electronegativity. How it increases and decreases also give example.
- Identify the electronic configuration of the following elements.
- Multiple Choice Questions (MCQs) of Ch 3 Chemistry Class 9.