Tuition Centre Singapore Chemistry Tuition – Elements

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Tuition Centre Singapore Chemistry Tuition – Elements

1. An element is a pure substance that cannot be split up into two or more simpler substances by physical processes or by chemical processes.
2. Each element has a symbol. The names and symbols of elements cam be found in the periodic table.
3. Most elements are metals. Examples of metals are aluminium (Al), copper (Cu) and zinc (Zn). Only 18 elements are non-metals. Examples of non-metals are sulfur (S) and phosphorus (P).
4. The atom is the smallest particle of an element that has the chemical properties of the element.
5. A molecule is a group of two or more atoms that are chemically combined.
6. Many non-metals exist as diatomic molecules. For example, hydrogen, oxygen and chlorine exist as diatomic molecules. The chemical formulae of these gases are H₂, O2, and C/₂
7. Metals and non-metals have different physical and chemical properties.

Please contact Angie @ 96790479 or Mr Ong @ 98639633 if you need Pure or Combined Chemistry Tuition