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(CHEM) Lesson 1
| Term | Definition |
|---|---|
| What are the 14 properties of substances? | 1.Electrical Conductors 2.Electrical Insulators 3.Density 4.Acidity 5.Flammability 6.Reactivity 7.Malleability 8.Ductility 9.Solubility 10.Boiling Point 11.Melting Point 12.Polarity 13.Elasticity 14.Corrosiveness |
| These 14 properties of matter could be classified into 2 properties. What are the 2 types of properties of Matter? | The 2 types of properties of matter are physical property and Chemical Property. |
| A. Physical Property | Measured without changing a substance's chemical identity.This can be further classified as intensive and extensive properties. The said classification is based on the dependency on the amount of substance. |
| A1. Intensive property | A physical property of matter that is INDEPENDENT of the amount of a substance. |
| A2. Extensive Property | A physical property of matter that DEPENDS on the amount of the substance. |
| B. Chemical Property | A property of a matter that is measured only by changing the substance's identity. |
| Examples of Physical Property | -Color -Electrical Conductors -Electrical Insulator -Density -Malleability -Ductility -Solubility -Boiling point -Melting point -Polarity -Brittleness -Elasticity |
| Examples of Chemical property | -Acidity -Flammability -Reactivity -Corrosiveness |
| 1.Electrical Conductors | Materials that can transmit the flow of energy. They have freely moving easily. Ex:Ag Cu Au |
| 2.Electrical Insulators | Materials that prevent the flow of energy. They prevent electrons from moving through them. Ex:Tires,wood,plastic |
| 3.Density | Depends on the temperature and pressure when it's measured. (or the measurement of how tightly a material is packed together.) Ex. Solid have the highest densities while gases have the lowest densities because the particles are widely spaced. |
| 4.Acidity | Acidic solutions have a greater concentration of hydrogen ions, and basic solutions have a lower concentration of hydroxide ions. Anything with a low pH (hydrogen potentials) is acidic, while substances with a high pH are alkaline. |
| 5.Flammability | Flammable materials largely depend on the chemical elements present in their structures. The presence of more carbon generally results in more flammable material. |
| 6.Reactivity | The substance's tendency to undergo a chemical reaction, either by itself or with other materials, and to release energy. Reactive can be hazardous and poisonous when caused to react by heat, pressure, shock, friction, catalyst, contact with air or water. |
| 7.Malleability | Ability of a material to be pressed, hammered, or rolled into thin sheets without breaking the matter. |
| 8.Ductility | Ability of a material to be stretched under stress and converted into thin wire. |
| 9.Solubility | Ability of a substance to be dissolved (solute) in a given substance (solvent). Ex: solute- coffee, milk, & sugar solvent- water |
| 10.Boiling point | The temperature at which a substance changes from liquid into gas. |
| 11.Melting point | The temperature at which a material changes from solid into a liquid. |
| 12.Polarity | The way at which an atom forms a covalent bond. This relates to solubility, boiling and melting points, and intermolecular attractions between molecules. |
| 13.Elasticity | The tendency of a material to return to its original form or shape after being stretched |
| 14.Corrosiveness | A property of a material that causes gradual destruction by a chemical reaction such as strong acids, oxidizers, and bases. |