This question is about tantalum and its extraction.
Tantalum is a transition metal. Match each property of tantalum to the correct reason for that property.
Properties:
Reasons:
Tantalum can be mixed with other metals to make superalloys. What is meant by an 'alloy'?
Coltan is an ore containing tantalum pentoxide. Coltan contains between 15%15\%15% and 40%40\%40% tantalum. Pure tantalum pentoxide always contains 82%82\%82% tantalum. How does this show that coltan is a mixture and not a compound?
In one stage of tantalum extraction, potassium heptafluorotantalate, K2TaF7\text{K}_2\text{TaF}_7K2TaF7, is used. Give the total number of atoms in the formula K2TaF7\text{K}_2\text{TaF}_7K2TaF7.
A sample of coltan ore contains 28%28\%28% tantalum. Calculate the maximum mass of tantalum that can be extracted from 350,000 kg350,000\text{ kg}350,000 kg of this sample of coltan. Give your answer in standard form.
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