Metallic Bonding, Structure & Properties
Specification Point 1.40:
Explain the properties of metals, including malleability and the ability to conduct electricity.
Diagram showing the sea of free electrons which moves around the regularly ordered positive metal atoms
Metals & Non-Metals
Specification Point 1.42:
Describe most metals as shiny solids which have high melting points, high density and are good conductors of electricity whereas most non-metals have low boiling points and are poor conductors of electricity.
Metals and nonmetals
- The Periodic Table contains over 100 different elements.
- They can be divided into two broad types: metals and nonmetals.
- Most of the elements are metals and a small number of elements display properties of both types. These elements are called metalloids or semimetals.
The metallic character diminishes moving left to right across the Periodic Table
Properties of metals
- Conduct heat and electricity.
- Are malleable and ductile (can be hammered and pulled into different shapes).
- Tend to be lustrous (shiny).
- Have high density and usually have high melting points.
- Form positive ions through electron loss.
- Form basic oxides.
Properties of nonmetals
- Do not conduct heat and electricity.
- Are brittle and delicate when solid and easily break up.
- Tend to be dull and nonreflective.
- Have low density and low melting points (many are gases at room temperature).
- Form negative ions through electron gain (except for hydrogen).
- Form acidic oxides.
Edexcel GCSE Chemistry Notes
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Morgan’s passion for the Periodic Table begun on his 10th birthday when he received his first Chemistry set. After studying the subject at university he went on to become a fully fledged Chemistry teacher, and now works in an international school in Madrid! In his spare time he helps create our fantastic resources to help you ace your exams.
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