Question 1
Explain why both flame tests and atomic absorption spectroscopy (AAS) can be used to identify sodium ions in a sample.
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Chemistry · Unit 1 · Properties and structure of atoms · Atomic structure
Explain that flame tests and atomic absorption spectroscopy (AAS) rely on electron transfer between atomic energy levels.
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Question 2
Which statement correctly explains why a sodium compound produces a characteristic yellow-orange colour in a flame test?
Question 3
Explain why sodium produces a characteristic yellow emission line at 589 nm in a flame test but absorbs light at the same wavelength in atomic absorption spectroscopy (AAS).
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Explain that elements of the periodic table show trends in chemical and physical properties across periods and down groups as exemplified by groups 1, 2, 13 –18 and period 3.
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Explain that ions are atoms or groups of atoms that are electrically charged due to an imbalance in the number of electrons and protons.