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This question is about atomic structure - AQA - A-Level Chemistry - Question 2 - 2021 - Paper 1
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This question is about atomic structure. 0.2.1 Define the mass number of an atom. 0.2.2 Complete Table 3 to show the numbers of neutrons and electrons in the speci... show full transcript
Worked Solution & Example Answer:This question is about atomic structure - AQA - A-Level Chemistry - Question 2 - 2021 - Paper 1
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Step 2
Step 3
Calculate the percentage abundance of \(^4Ti\) in this sample.
Answer
Let the abundance of (^4Ti) be (x) and the abundance of (^3Ti) be (y). Given the relative atomic mass is 47.8:
Setting up the equation:
[ 47.8 = \frac{(x \cdot 48) + (y \cdot 47) + (1/2 x \cdot 47) + (20\cdot 48) }{x + y + \frac{1}{2}x + 20} ]
Assuming (x+y+ rac{1}{2}x+20 = 2:2:1), we find the ratio and solve:
Let the total abundance equal 6k: (x = 2k, y = 2k, \frac{1}{2}x = k).
Solving yields the percentage: ( \frac{x}{2k} \times 100 = 8% )