Robitussin Cough and Cold is an over the counter cough suppressant, expectorant and nasal decongestant. This multi-symptom medication helps relieve cough and cold symptoms. Dextromethorphan HBr 10mg (cough suppressant) Guafenisen 100mg (expectorant)
Mixture; Metal; Element; Crystal. In its scientific usage, the term metal means a metallic element. An alloy is a mixture or solid solution composed of a metal and another element. But in everyday language, we often use the word metal to describe what an alloy is. That is because a mixture of metallic elements is called an alloy. Iron is a metal element. Steel is a mixture of iron with other elements such as carbon, nickel, chromium, etc. and so is an alloy. An alloy is a mixture of either pure or relatively pure chemical elements, forming an impure substance retaining the characteristics of a metal. Alloy constituents are usually measured by mass.
Compounds are pure substances made of atoms of two or more elements chemically combined in fixed ratios. Compounds must meet all of these criteria: Compounds are pure substances and not mixtures. Compounds are pure substances and not mixtures. 2  For example, table salt is not a compound because it is a mixture of sodium chloride, dextrose and calcium silicate (to keep it from clumping in high humidity) and potassium iodide (an important nutrient necessary for proper thyroid function).