Mixtures and Compounds: Fundamentals & Key Differences
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11 cards
Question: What is a compound?
Answer: A substance containing two or more elements that are chemically joined (bonded).
Question: How do the properties of a compound compare to its individual elements?
Answer: A compound has different properties to its individual elements.
Question: How can you separate a compound into its elements?
Answer: By using chemical reactions.
Question: Is nitinol an element, compound, or mixture? Explain using its particle model of Ni and Ti.
Answer: Nitinol is a mixture (an alloy) because it is made from at least two different metals (nickel and titanium) combined together, not chemically bonded a
Question: What is an alloy?
Answer: An alloy is a substance made up of at least one metal (often two) combined to give greater strength or different melting points.
Question: Give an everyday use of nitinol mentioned in the content and why it's useful.
Answer: Nitinol is used in the frames of glasses because when bent out of shape it can return to its original shape on heating.
Question: In the context of air as a mixture, which parts of air are elements and which are compounds?
Answer: Oxygen and nitrogen are elements; carbon dioxide is a compound.
Question: What does the term 'diatomic' mean and which atoms mentioned are diatomic?
Answer: Diatomic means atoms that exist in pairs (two atoms bonded together). Oxygen and nitrogen are examples of diatomic atoms mentioned.
Question: Why is air considered a mixture rather than a pure substance?
Answer: Because air contains a combination of different substances (elements and compounds) mixed together, not chemically bonded into a single substance.
Question: Name one example from the content that is a compound and one example that is an element.
Answer: Compound: water. Element: neon (or nitrogen).