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Each element has a unique set of properties that is different from the set of properties of any other element. Forexample, the element iron is a solid that is attracted by a magnet and can be made into a magnet, like the compassneedle shown in the Figure 2.1. The element neon, on the other hand, is a gas that gives off a red glow whenelectricity flows through it. The lighted sign in the Figure 2.2 contains neon.
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