Oxygen (O₂) (beginner)

A colorless, odorless gas, an important component of the atmosphere, indispensable to sustain terrestrial life.

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Dangerous plastic

Environmental organizations are against the use of PVC.

Nitric acid (HNO₃)

One of the oxoacids of nitrogen. A colorless compound with a pungent odor, a strong oxidant.

Silver chloride (AgCl)

A white, crystalline compound that breaks down when affected by light.


Metal atoms form a regular lattice structure.

Iodine (I₂)

A solid, gray substance which sublimates when heated. Its solution in alcohol is called...

The reaction between aluminium and bromine

The halogens and the metals combine to produce bromides.

Sulfur trioxide (SO₃)

One of the oxides of sulfur, forms sulfuric acid with water.

Water (H₂O)

Water is a very stable compound of hydrogen and oxygen, vital for all known forms of...

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