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Döbereiner's Triads and Mendeleev's Periodic Table were both based on the idea that properties of elements tended to repeat.
60-degree Angle
An angle measuring 60 degrees, often associated with equilateral triangles where all three interior angles are equal.
Productive Cough
A cough that expels mucus or phlegm from the respiratory tract, assisting in clearing the airways.
Short of Breath
The sensation of struggling to breathe or draw deep breaths, often indicative of respiratory conditions, cardiac issues, or exertion.
Health History
A record detailing an individual's past medical conditions, treatments, surgeries, and family medical history, used for assessment or treatment.
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