Lead is a non-ferrous material and it’s the densest one, and because of this lead is used for protection for noises, X-rays and gamma rays. Its melting temperature is so low that it’s easy to mould in complicated shapes like little pieces of chess, bullets. It has another important propriety: lead doesn’t tend to corrode with air, water and acids, what makes it useful for fountains and antioxidant paints. Lead is a very useful metal but it has a problem: it is toxic and pollutant. In the past lead was used for pipes but when it was known that it was toxic, industries started to make them of plastic. If we ingest lead, even an extremely small and tiny particle, it’s toxic for us and we can’t expel it from our body. So we have to be very careful with it.
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