OXYGEN (O2) PROPERTIES AND USES
Post Views: 611 OXYGEN (O2) PROPERTIES AND USES Oxygen (O2) is an active, life-sustaining component of the atmosphere; making up… Read More »OXYGEN (O2) PROPERTIES AND USES
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RUSTING OF IRON
Post Views: 301 RUSTING OF IRON Corrosion The eating up of metals by the action of air and moisture on… Read More »RUSTING OF IRON
WATER AND HYDROGEN
Post Views: 354 WATER AND HYDROGEN Hydrogen is the simplest element. It is the first element in the periodic table,… Read More »WATER AND HYDROGEN
AIR AND COMBUSTION
Post Views: 225 AIR AND COMBUSTION Percentage of Oxygen in Air We have read that Air consists mainly of molecules… Read More »AIR AND COMBUSTION
INDICATORS
Post Views: 166 INDICATORS Red cabbage juice solution works well instead of universal indicator solution. Making Cabbage Indicator Acid base… Read More »INDICATORS
AN ALKALI
Post Views: 241 AN ALKALI Alkali is pronounced like alcohol, with ‘lie’ at the end instead of ‘hol’. An alkali… Read More »AN ALKALI
ACIDS, BASES AND INDICATORS
Post Views: 415 ACIDS, BASES AND INDICATORS Introduction All the elements in nature fall into three classes: metals, non-metals and… Read More »ACIDS, BASES AND INDICATORS
COMPOUNDS AND FORMULA
Post Views: 179 COMPOUNDS AND FORMULA A compound is a pure substance formed by chemically combining at least two different… Read More »COMPOUNDS AND FORMULA
SEPARATION OF MIXTURES
Post Views: 148 SEPARATION OF MIXTURES Sometimes we need pure substances as opposed to impure ones. You can imagine a… Read More »SEPARATION OF MIXTURES
DISTINCTION BETWEEN COMPOUNDS AND MIXTURES
Post Views: 181 DISTINCTION BETWEEN COMPOUNDS AND MIXTURES The following example of iron, sulphur and iron sulphide will make us… Read More »DISTINCTION BETWEEN COMPOUNDS AND MIXTURES
CONSTITUENTS OF MATTER
Post Views: 188 CONSTITUENTS OF MATTER Atoms, Molecules, Elements and Compounds The Atom An atom is the smallest particle of a… Read More »CONSTITUENTS OF MATTER
CONDUCTORS AND INSULATORS
Post Views: 154 CONDUCTORS AND INSULATORS The ability to conduct electricity is the major simple distinction between elements that are… Read More »CONDUCTORS AND INSULATORS
CLASSIFICATION OF SUBSTANCES
Post Views: 240 CLASSIFICATION OF SUBSTANCES Pure Substance Pure means that only one substance is present in the material and can… Read More »CLASSIFICATION OF SUBSTANCES
EVAPORATION AND BOILING
Post Views: 152 EVAPORATION AND BOILING (LIQUID TO GAS) On heating particles gain kinetic energy and move faster. In… Read More »EVAPORATION AND BOILING
CONDUCTORS AND NON-CONDUCTORS
Post Views: 171 CONDUCTORS AND NON-CONDUCTORS All metals (copper, iron, lead, magnesium etc) and graphite, a non-metal. Most non-metals (sulphur,… Read More »CONDUCTORS AND NON-CONDUCTORS
COMPOUNDS AND THEIR PROPORTIONS
Post Views: 147 COMPOUNDS AND THEIR PROPORTIONS All elements are represented by a chemical symbol. It is either a single… Read More »COMPOUNDS AND THEIR PROPORTIONS
MATTER
Post Views: 169 MATTER Matter is: Anything that has mass and occupies space (has volume) Composed of particles (molecules, ions,… Read More »MATTER
SIMPLE CLASSIFICATION OF SUBSTANCES
Post Views: 189 CLASSIFICATION OF SUBSTANCES Matter Matter can be classified as either a mixture or a pure substance. Mixtures… Read More »SIMPLE CLASSIFICATION OF SUBSTANCES
NAMES OF LABORATORY APPARATUS
Post Views: 490 NAMES OF LABORATORY APPARATUS Which apparatus? You wouldn’t dream of trying a chicken using a spoon, or… Read More »NAMES OF LABORATORY APPARATUS
SCIENTIFIC METHOD
Post Views: 143 SCIENTIFIC METHOD The scientific method is a set of ideas or a procedure that scientists use to… Read More »SCIENTIFIC METHOD