Chapter #4: Glossary Terms
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Anything that has mass and takes up space. All matter is made up of tiny particles.
Examples: wood, air, and water.
A pure substance contains only one kinda of particle, and cannot be broken down any further. They can either be elements or compounds.
Examples: gold, nitrogen, oxygen, and water.
A mixture contains more than one kind of particle and can be seperated by physical methods. They share the same space. They can either be solutions or mechanical mixtures.
Examples: steal, brass, bronze and pop.
An element is a pure substance that cannot be broken down into simpler parts and still be the same.
For example, elements on the periodic table of elemnts such as lithium, helium, and sodium.
- A compund is a pure substance that is made of two or more different elements that are chemically combined.
- For example:
- ~water H20
- ~carbon dioxide CO2
- ~glucose C6H12O6
A physical property is a characteristic of a substance that can be observed and measured without changing the identity of the substance.
They can either be qualitive, which is a property that can be observed and described without detailed measurement.
Or they can be quantative, which is a porperty that can be measured and assigned a particular value.
Quantative properties are often distinctive, to a particular element or compound.
Viscosity is the resistance to flow.
The melting point is the temperature of melting. For example the melting point of iron is 1538° C.
The boiling point is the temperature of boiling. For example the boiling point of water is 99.98° C.
Solubility is the ability of a substance to dissolve into another substance.
Density is the ratio of mass to volume.
Chemical property describes the behaviour of a substance as it reacts with another substance to form one or more new substances.
Combustibility is the ability of a substance to react rapidly with oxygen to produce carbon dioxide.
Example: propane is used as a fuel to cook and heating air or in hot air ballons.
- The WHMIS symbol for combustible:
Stability is the ability of a substance to remain unchanged.
Toxicity is the ability of a substance to cause harmful effects in plants and animals.
- The WHMIS symbol for toxic:
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