Occurrence of Metals and Non-metals in Nature
Chemistry ⇒ Metals and Non-metals
Occurrence of Metals and Non-metals in Nature starts at 6 and continues till grade 12.
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Describe the difference between minerals and ores with respect to the occurrence of metals.
Describe the occurrence of phosphorus in nature.
Explain the difference in occurrence between reactive and less reactive metals in nature.
Explain why aluminium, despite being highly reactive, is found in the Earth's crust in large quantities.
Explain why noble gases are found in the free state in nature.
Explain why sodium and potassium are never found in the free state in nature.
Name the most abundant non-metal in the Earth's crust.
Name the two main forms in which carbon occurs in nature.
Name two non-metals that exist as diatomic molecules in nature.
Which non-metal is the most abundant element in the Earth's atmosphere?
Describe how the occurrence of hydrogen in nature differs from that of oxygen, and explain the reasons for this difference.
Describe the main differences in the natural occurrence of halogens compared to noble gases, and explain the chemical reasons for these differences.
Explain why metals such as iron and aluminium are commonly found as oxides in the Earth's crust, while metals like gold and platinum are found in their native state. Relate your answer to their positions in the reactivity series.
Explain why non-metals such as sulphur and phosphorus are often found in the combined state in nature, and provide examples of their common compounds.
