alleryStart learning →In a flame test, which alkaline earth metal produces a characteristic green colour?
ACalcium
BStrontium
CBarium
DMagnesium
Answer & Solution
Correct answer: C. Barium
1. Like the alkali metals, the heavier alkaline earth metals impart distinctive colours to a flame due to their emission spectra.
2. The text states: "Calcium and strontium produce shades of red, whereas barium produces a green color."
3. So calcium and strontium are associated with red flame colours, while magnesium (which burns very brightly white) is not mentioned as giving a specific flame colour here.
4. Barium is the alkaline earth metal specifically linked to a green flame test colour.
_Source: OpenStax Chemistry Ch 18 "Representative Metals, Metalloids, and Nonmetals", p.968 §18.1 Periodicity_
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