As a true science, chemistry began its scientific study during the 1600s. This is when chemists discovered the simple substances that make up all other substances. These simple substances are called elements.
A chemical compound is a substance which is made up of two or more elements.
रसायनशास्त्रका हाँगाहरू[सम्पादन गर्ने]
पनि हेर्नुहोस्[सम्पादन गर्ने]
- The Periodic table
- List of common elements
- Common chemical apparatus
- Laboratory techniques
- Chemical techniques