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.
Consider the following scenario: A geologist discovers a mineral sample containing a high percentage of a metal in the form of sulphide. Based on your knowledge of the occurrence of metals, which of the following metals is most likely to be present in the sample?
(1) Silver
(2) Sodium
(3) Magnesium
(4) Potassium
Which of the following is a major source of chlorine in nature?
(1) Common salt
(2) Bauxite
(3) Hematite
(4) Quartz
Which of the following is an ore of iron?
(1) Bauxite
(2) Hematite
(3) Galena
(4) Cinnabar
Which of the following is NOT a non-metal?
(1) Sulphur
(2) Phosphorus
(3) Magnesium
(4) Carbon
Which of the following is the most abundant metal in the human body?
(1) Iron
(2) Calcium
(3) Sodium
(4) Potassium
Fill in the blank: The main ore of aluminium is __________.
Fill in the blank: The main ore of copper is __________.
Fill in the blank: The main ore of lead is __________.
Fill in the blank: The main ore of zinc is __________.
State whether the following statement is true or false: 'Metals with low reactivity are more likely to be found in the native state.'
State whether the following statement is true or false: 'Non-metals are generally found in the free state in nature.'
State whether the following statement is true or false: 'Sulphur is found in both free and combined states in nature.'
True or False: All non-metals are found in the gaseous state in nature.
