The document discusses elements, which are the simplest substances that make up matter and cannot be broken down further through chemical reactions. Each element has its own symbol, sometimes using the first letter of its name, as there are more elements than letters in the English alphabet. Students are assigned homework to design an informative poster about an element from the periodic table highlighting its name, symbol, discovery, natural sources, and uses.

1. 10 October 2010 4.3 Organising Elements How many ways have you heard the word ‘Elements’?

2. Chapter 4: What’s in a reaction % Level Student target Teacher Comment

3. Goud Gold Guld Aur Or Oro Gulli

4. What are the elements made from? The word elementary means simple. Elements are simple substances. The particles that make up an element are called atoms (indivisible). An atom is the smallest particle of an element you can get (normally) You cannot split up an element into anything simpler using chemical reactions.

5. Symbols and Signs Each element has its own symbol. Sometimes the symbol is the first letter of the name. The symbol for carbon is C and the one for oxygen is O. There are 115 elements and only 26 letters in the English alphabet so most have two letters Aluminium is Al and copper is Cu. The same chemical symbols are used throughout the world. The letters do not always match the symbols, like Pb for lead and Ag for silver

13. Non-metals Metals

14. Using the chemical symbols, come up with as many words as you can . A commendation for the longest word and five if its longer than mine. E.g. LiON(lithium, oxygen, nitrogen)

15. HYPErCoNScIOUSnEsSeS Hydrogen-Yttrium-Phosphorous-Erbium-Cobalt-Nitrogen-Scandium-Iodine-Oxygen-Uranium-Tin-Einsteinium -Selenium-Sulfur

16. Homework Choose any element from the periodic table and design a poster highlighting: The name The symbol The first time it was used Where it is found Uses Make it interesting!