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The compound of hydrogen and oxygen. Colourless, odourless liquid; heavier than water.
A white, crystalline compound that breaks down when affected by light.
Colourless, odourless, heavier-than-air gas. Necessary for the photosynthesis of plants.
A colourless, odourless gas, an important component of the atmosphere, indispensable to...
A compound ion formed when a water molecule releases a proton.
Limestone is a widely and diversely used material.
Colourless liquid that gives off smoke in moist air.
The presence of hydronium ions relative to hydroxide ions determines a solution´s pH.