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Helium Prezi

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Emily King

on 6 June 2013

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Transcript of Helium Prezi

By Emily King and Taylor Donnelly Helium Atomic Mass: Discovery of Helium Sir William Ramsay was the founder of Helium during the year 1895 in London. Sir William named Helium the way it is after the Greek name 'helios' which means 'sun', as it was the sun's corona which was initially detected to discover helium. Image of Helium Atom Electrons What is Helium used for ? Helium is a gas that is lighter than air, so commonly used to fill blimps, balloons and airships, as it doesn't burn or react to other chemicals and relatively safe to use for this purpose. Because Helium is a popular source for these examples, the rate at which helium is currently being used is faster than the rate it's being restored. New technology for recycling helium is one way that gas companies can slow the problem of over-using helium and replenish the reserves. What State is Helium exactly? Helium being mainly gas, is able to change
state at change of temperature. It is a gas at room temperature, but can be solid OR liquid at anything below 0 Degrees Celsius.
However, Helium has some unusual properties when it is cold. It can conduct electricity and heat with almost no resistance and can even climb up the walls of its container
and escape! Helium - Is it dangerous? Helium is less dense than normal air, therefore when inhaled from a balloon (e.g.) it momentarily changes the voice of the inhaler creating a higher pitch. However, breathing in too much helium CAN be very dangerous, potentially choking people due to lack of oxygen. Atomic Number: Number of Neutrons: Number of Electrons: Symbol: Number of Protons: He 2 4.0026 2 2 2 Fact Circle Melting Point: Boiling Point: Density kg/m-3: 120 -268.93 Degrees C -272.2 Degrees C Colourless, Odourless, Tasteless Appearance: THANKS FOR WATCHING & Neutrons Protons Cost: $520 p/100g
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