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History of the discovery of metals

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CT
Chris Terry

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History of the discovery of metals par Mind Map: History of the discovery of metals

1. Extraction of Metals

1.1. Electrolysis

1.2. Heating ore with carbon

1.3. Heating

1.4. Excavation

2. Factors affecting rarity of metals

2.1. Reactivity

2.2. Boiling point & Melting point

2.3. Appearance and detectability

3. History

3.1. First metal discovered: Gold

3.2. Metal discovered in 6000BC

3.3. Metals with low reactivity are discovered first

3.4. 86 metals discovered so far

4. Previous uses of metals

4.1. Form of monetary currency

4.2. Component for weapons

4.3. Measure of wealth and infulence