Elements are substances that cannot be separated into simpler substances. Each element has its own type of properties.Symbols
are used by scientists to identify the elements.A molecule is the smallest particle of a substance that exists by itself. Gases are special as their atoms are not able to exists individually.
Compounds
A compound is formed when 2 or more elements
chemically bonded together.When elements of thecompound bonded,the individual properties will be
gone and the newly formed compound will have
different properties from the elements that it is made up from.
Mixtures
Mixtures are 2 or more substances that are mixed
together but not chemically bonded.Mixtures can be
separated by physical means.
Taken from: http://www.nyu.edu/pages/mathmol/textbook/compounds.html
No comments:
Post a Comment