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Chemistry 9th Class Chemistry

Chapter 3 Periodic Table 9th Class Chemistry Notes

Chapter 3 Periodic Table 9th Class Chemistry Notes Question#1: Define Periodic table? What is the importance of periodic table? Answer: Periodic Table:- Periodic table is the arrangement of elements in order of increasing atomic number in such a way that those with similar properties are placed one above other in the form of a table. OR Periodic table […]

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Chemistry 9th Class Chemistry

Chapter 1 FUNDAMENTALS OF CHEMISTRY – 9th Class Chemistry Notes

Chapter 1 FUNDAMENTALS OF CHEMISTRY – 9th Class Chemistry Notes Question#1) Write a short note on history of chemistry? Answer:History of Chemistry: Chemistry derived its name from word alchemy, which is a European word derived from the Arabic word al-kimia. Alkemai is the old name of Egypt. The word alcheme, khame, kheme means black earth. […]