Elements, Compounds and Mixtures Flashcards
Define the term “element”.
An element is a pure substance that consists of only one type of atom and cannot be broken down into simpler substances by chemical means.
All matter is made of _______.
elements
Define the term “compound”.
A substance composed of two or more different atoms chemically bonded to one another.
How can compounds be separated?
They can only be destroyed by chemical processes.
Define the term “mixture”.
A material containing two or more elements or compounds that are in close contact and mixed in any proportion.
How can mixtures be separated?
By physical means like filtration, evaporation, sublimation and magnetic separation.
What is the difference between pure substances and mixtures?
List the types of mixtures.
Homogeneous mixtures and Heterogeneous mixtures
Define “homogeneous mixture”.
Has the same uniform appearance and composition throughout its mass.
Define “heterogeneous mixture”.
Consists of visibly different substances or phases and is not uniform in its composition.
Differentiate between homogenous mixtures and heterogenous mixtures.
