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chemical and physica
chemical and physical
| Question | Answer |
|---|---|
| Physical property | A characteristic of matter that can be observed and measured without changing the identity or chemical makeup of the substance |
| Examples of physical properties | Color, odor, size, hardness, luster, phase of matter, mass, density, boiling point, melting point, solubility, conductivity |
| color | Physical property; can be observed by looking at it |
| odor | Physical property; many substances have a noticeable odor |
| size | Physical property; can be measured without altering the chemical makeup of the substance |
| hardness | Physical property; the measure of how difficult or easy it is to scratch a substance |
| luster | Physical property; describes how light is reflected off of the surface of an object (How shiny is it?) |
| mass | Physical property; measures the amount of matter in an object |
| weight | Physical property; measures the force of gravity on an object |
| density | Physical property; how tightly packed the atoms in an object are; mass divided by volume |
| Boiling point | Physical property; the point at which a substance changes from a liquid to a gas |
| Melting point | Physical property; the point at which a substance changes from a solid to a liquid |
| Electrical conductivity | Physical property; the measure of a material’s ability to allow the transport of an electrical charge |
| Chemical property | A trait or behavior of a substance that gives it the ability or inability to undergo a chemical change; can only be observed when the substance is going through a chemical change or reaction |
| Examples of chemical properties | reactivity, combustibility (flammability), and toxicity |
| reactivity | Chemical property; how easily an atom has a chemical reaction with another element |
| Combustibility and flammability | Chemical property; the ability a substance has to burn |
| combustion | Chemical property; a chemical reaction that produces heat and light |
| toxicity | Chemical property; the ability and strength of a substance to cause poisonous effects to living things |
| Physical change | Change that happens without changing the chemical composition of a substance; no new substance is formed; usually (but not always) reversible |
| Chemical change | Occurs when a substance undergoes a change that creates a new substance with different chemical and physical properties than the original substance; not reversible |
Created by:
caleb0765
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