Скачать или смотреть L 4 # Some Basic Concepts of chemistry # Significant figures and Scientific Notation

This lecture focuses on the concept of significant figures — the digits in a number that carry meaningful information about its precision. Students will learn how to identify, count, and apply significant figures in measurements and calculations. The importance of accuracy and precision in scientific data will be discussed, along with rules for rounding off numbers and handling significant figures during mathematical operations such as addition, subtraction, multiplication, and division.

This lecture also introduces the concept of scientific notation, a method used to express very large or very small numbers in a compact, standardized form. Students will learn how to convert numbers to and from scientific notation and how to perform basic mathematical operations using this format. The lecture emphasizes how scientific notation simplifies calculations and improves clarity in expressing quantities used in physics, chemistry, and mathematics.