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Chemistry · Unit 1 · Properties and structure of atoms · Atomic structure

flame tests to identify elements

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Question 1

A student performs flame tests on four unknown metal chloride samples. The flame colours observed are: Sample A — brick red; Sample B — lilac; Sample C — crimson; Sample D — golden yellow. Which sample contains potassium ions?

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Explain that the relative atomic mass of an element is the ratio of the weighted average mass per atom of the naturally occurring form of the element to 1/12 the mass of an atom of carbon-12. Analytical techniques
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