Additional Science

... Year 10 Additional Science Holiday Homework 1) What are the two common isotopes of chlorine made up of? There are two types of chlorine atom- one has 17 protons and 18 neutrons(and so has a relative atomic mass of 35) and the other has 17 protons and 20 neutrons(and so has a relative atomic mass of 37). 2) Why was the Haber process such an important invention? Fritz Haber was a German chemist, who received the Nobel Prize in Chemistry in 1918 for his development of synthetic ammonia, important for fertilizers and explosives. The Haber process is the reaction of nitrogen and hydrogen, over an iron catalyst to produce ammonia. The Haber process is important sue to the fact ammonia is difficult to produce, on an industrial scale. The Haber process now produces 100 million tonnes of nitrogen fertilizer each year. 1% of the world's annual energy supply is consumed in the Haber process and that fertilizer is

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