JSS2 Basic Science Lesson Note on Chemical Elements and Compounds

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TOPIC: Chemical elements and compounds

Meaning of elements

Elements are substances that cannot be broken down into anything else. Everything in the world are built up from these elements. There are about one hundred and twelve (112) elements known today. Scientists use short forms called symbols to represent elements as shown below.

Name of elements      symbols

1. Hydrogen H
2. Helium  He Names of elements derived from the Latin name
3. Lithium  Li                     English name         Latin name           Symbol
4. Beryllium  Be                    Sodium                 Natrium                      Na
5. Boron B                           Iron                         Ferrum                    Fe
6. Carbon  C                       Copper                    Cuprum                 Cu
7. Nitrogen  N                      Potassium                Kalium                 K
8. Oxygen O                         Silver                         Argentum           Ar
9. Fluorine F                          Gold                           Aurum               Au
10. Neon Ne                            Lead                           Plumbum           Pb
11. Sodium  Na                     Mercury                     Hydrargyrum     Hg
12. Magnesium Mg
13. Aluminum Al
14. Silicon Si
15. Phosphorus  P
16. Sulphur S
17. Chlorine Cl
18. Argon Ar
19. Potassium K
20. Calcium. Ca

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