People count in twos, fives, twenties etc. Also the days of the week can be counted in 24 hours. Generally […]
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Mixtures and Separation Techniques
A mixture is made from different substances that are not chemically joined.For example powdered iron and powdered sulphur mixed together […]
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Oxidation numbers
OXIDATION NUMBERS It is often useful to follow chemical reactions by looking at changes in the oxidation numbers of the […]
In chemistry, a compound is a substance that results from a combination of two or more different chemical element s, […]
Atoms are the basic units of matter and the defining structure of elements. Atoms are made up of three particles: […]
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Molecules and Atomicity
MOLECULES AND ATOMICITY A molecule is the smallest particle in a chemical element or compound that has the chemical properties […]
Element Definition: A chemical element is a substance that cannot be broken down by chemical means. Elements are defined by […]
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Changes in state of matter
A material will change from one state or phase to another at specific combinations of temperature and surrounding pressure. Typically, […]
In our daily life, we come across many objects, the knowledge about which can be gained by one or more […]
CHEMISTRY LABORATORY COMMON EQUIPMENT Functions of common pieces of laboratory equipment. In most labs, you’ll encounter the same basic apparatus. […]