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Good morning ,everyone. Welcome to our tv programme "Chemistry and me"
Today ,we are going to introduce 3 elements and there physical or chemical properties. Let me pass to Professer Chan.
Ok. First, let's talk about oxygen. Oxygen is something that livings things need in order to maintain their lives. Oxygen exists in all three forms - liquid, solid, and gas. The liquid and solid forms are a pale blue colour.That is its physical property.
Helium is less dense than any other known gas except hydrogen and is about one seventh as dense as air. That is its physical property.
Secondly ,is about helium.Helium is use for fill in the ballons. but it is dangerous. So, we seldom see the balloons that is fill in with helium nowadays, even in the shops or here.
Helium reacts with very hot water and steam to produce hydrogen gas.That is its chemical property.
Lastly, is about iron.Iron is common in many different tools, surgical equipments, and appliances. like the appliance above.
Thank you. Profeeser Chan. That is all of today,s programme .Hope you enjoy.Bye
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