Today, I'm going talk about some element :Hydrogen ,oxygen and Sodium.
When the Hydrogen place with Chlorine,it will form Hydrogen chloride.This is one of the chemical property. It is colouress.This is one of its physical property.
Here is the oxygen.It is a kind of gases too.We can use it for burning food and it releases CO2.
Here are some Sodium. It is a soft and silvery-white.It can be found in common salt.
If you put large amount of it into the water...
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