Chemical properties of elements

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It can be used as a gamma-ray source on radiotherapy

Water is made up of this gas together with oxygen

It is the only liquid nonmetallic element at room temperature which evaporates easily in a red vapour with a strong disagreeable odour resembling that of chlorine

This element is necessary for our bones. It is found in foods such as milk and cheese.

This is the gas that we breath

It is a light, strong, lustrous, corrosion-resistant (including to sea water and chlorine) transition metal.

A natural yellow substance with a strog unpleasant smell produced in the volcanos

A hard strong metal that is used for making steel and is found in small quantities in blood