Chemicals Flashcards
What is an element?
It is a pure substance made up of only one type of atom and cannot be broken down into simpler substances
How many elements are there found currently?
118
What is a compound?
Two or more elements that are chemically combined together
What are the properties of a compound?
-It does not have the same properties as its original elements
-The original elements are always combined by a fixed proportion
-A compound cannot be separated easily
-It takes a lot of energy to break down the compounds to its original element
What is a mixture?
A mixture is made-up of two elements or compounds that are not chemically combined
What are the properties of a mixture?
-A mixture has the same characteristics as the original elements
-The original elements do not have a fixed proportion
-The original elements can be separated easily
What is a solution?
It is a mixture obtained when a solute completely dissolves in another substance
What is a solute?
The substance that dissolves in a solvent
What is a solvent?
The substance in which a solute dissolves in
What are the differences between solutions and suspensions?
-solution’s solute particles cannot be seen while suspension’s solute particles are visible
-Light can pass through solutions fully while light cannot pass through suspensions fully
-The solution solute does not settle to the bottom while the suspension solute settles to the bottom
What does the rate of dissolving refer to?
It refers to how quickly a solute dissolves in a solvent
What factors affect the rate of dissolving?
-particle size
-temperature
-rate of stirring
What is solubility?
it measures how much solute can dissolve in a fixed volume of a given solvent
What factors affect the rate of solubility?
-the type of solute
-the type of solvent
What’s the difference between rate of dissolving and solubility?
Rate of dissolving measures how fast while solubility measures how much
