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Hard water contains more calcium and can casue scaling on heater elements found in dishwashers, kettle and washing machines.
Elements found in nature are referred to natural elements, as opposed to synthetic, which are man made.
Particle accelerators are often used to create most synthetic elements. These machines accelerate particles to high speeds and then collide them to form new elements through nuclear reactions.
Elements are found on the periodic table and have a chemical bond
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Machines using vacuum tubes as their active elements.
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On the camshaft of automobiles Vending machines
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any of the elements found only in one place and why not
There are 2 elements found in ammonium, nitrogen and hydrogen.