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A reddish-brown toxic gas, very reactive due to its unpaired electron.
When two substances are heated, they combine to form a compound.
Limestone is a widely and diversely used material.
One of the allotropes of phosphorus.
Metals forming hexagonal metallic lattices are rigid and difficult to machine.
A compound ion generated when a proton is added to an ammonia molecule.
A colourless, odourless gas, an important component of the atmosphere, indispensable to...
The halogens and the metals combine to produce bromides.