click below
click below
Normal Size Small Size show me how
Chemical & Physical
Question | Answer |
---|---|
physical property | A physical property is a characteristic of matter that can be observed and measured without changing the identity or chemical makeup of the substance. Some examples of physical properties are color, odor, size, hardness, luster, phase of matter, mass, de |
color | We can easily observe the color of a substance by looking at it. |
odor | Many substances have a noticeable odor. |
size | The size of a substance can be measured without altering the chemical makeup of the substance. |
hardness | Hardness is the measure of how difficult or easy it is to scratch a substance. |
luster | Luster describes how light is reflected off the surface of an object. (How shiny is the object?) |
mass | mass is the amount of matter in an object this stays the same -never changes |
weight | weight is how much something weights this can change -changings according on gravity |
density | Density is how tightly packed the atoms in an object are. |
boiling point | The boiling point is the point at which a substance changes from a liquid to a gas. |
melting point | The melting point is the point at which a substance changes from a solid to a liquid. |
solubility | Solubility is the measure in which an object dissolves into another object. |
electrical conductivity | Electrical conductivity is the measure of a materials ability to allow the transport of an electric charge . |
chemical property | A chemical property is a trait or behavior of a substance that gives it the ability or inability to undergo a chemical change. |
combustibility and flammability | Combustibility and flammability both mean the ability a substance has to burn. |
combustion | Combustion is a chemical reaction that produces heat and light. |
toxicity | Toxicity is the ability or strength of a substance to cause poisonous effects to living things. |
physical change | A physical change is a change that happens without changing the chemical composition of a substance. No new substance is formed. The change is usually (but not always) reversible. The form, size, shape, or color of an object can be changed without a |
chemical change | A chemical change occurs when a substance undergoes a change that creates a new substance with different chemical and physical properties than the original substance. The change is not reversible. |
Reactivity | How easily an atom has a chemical reaction with another element |
What causes the odor when milk sours? | When milk begins to ferment (break down), it smells bad because of the bacteria that is being formed. Chemicals with a sour odor are released by this bacteria. |
What causes the bubbles in a chemical reaction? | Some chemical reactions occur and cause a gas to form. The bubbles are the evidence of the gas fumes escaping. |
What is a precipitate? | It is an insoluble (can’t dissolve) solid that is formed when two liquids combine. |
examples of chemical property | oxidation, toxicity, reactivity, flammability,combustibility, radioactivity, |
examples of chemical change | example of oxidation, example of toxicity, example of reacting, formation of compound |
example of physical change | cutting, changing phase, example of dissolving |
example of physical property | color, mass, odor, hardness, phase, solubility, size, boiling point, melting point, density, conductivity, metal, nonmetal, metalloid, magnetism, ability to dissolve,luminescence, specific gravity, malleable |