A single-displacement reaction, also known as asingle-replacement reaction, is a type of chemicalreaction<span> where an element reacts with a compound and takes the place of another element in that compound. This type of </span>reaction<span> is typically pictured like this: Here, A replaces B in the compound BC.</span>
2K + Br₂ = 2KBr
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Answer: The first one is your answer. (If two people pull on it in opposite directions, it stretches. Then when they let it go, it returns to its original size and shape.)
