CBSE Class 11 Chemistry Revision Notes Set E

CBSE Class 11 Chemistry Notes - Some Basic Concepts of Chemistry. Learning the important concepts is very important for every student to get better marks in examinations. The concepts should be clear which will help in faster learning. The attached concepts made as per NCERT and CBSE pattern will help the student to understand the chapter and score better marks in the examinations. 

Chapter notes

Class: XI

Chapter 1: Some Basic Concepts of Chemistry

Top concepts

1. The SI system has seven base units which pertain to the 7 fundamental scientific quantities.

2. The unit is written on the right of the quantity with a space between them.

3. The SI system allows the use of prefixes to indicate the multiples or submultiples of a unit.

4. To indicate very small numbers, we use negative exponents.

5. To indicate large numbers, we use positive exponents.

6. Scientific notation is the proper representation of a number in exponential form.

7. Precision indicates how closely repeated measurements match each other.

8. Accuracy indicates how closely a measurement matches the correct or expected value.

9. A result is valid only if it is both accurate and precise.

10. Significant figures are meaningful digits which are known with certainty.

11. There are certain rules for determining the number of significant figures:

i) All non-zero digits are significant

ii) Zeros preceding the first non-zero digit are not significant

iii) Zeros between two non-zero digits are significant.

Please click the link below to download pdf file for CBSE Class 11 Chemistry Notes - Some Basic Concepts of Chemistry.