Pure Substance

CScope Unit 3 Vocabulary and Key Understanding
1. Element- a pure chemical substance made of only one kind of
2. Pure Substance -a material with a definite (certain, fixed)
chemical composition
3. Chemical Symbol -Notation of one or two letters derived from the
scientific names of the chemical elements.
4. Circle Graph- A graph comparing the parts of something to the
whole thing.
5. Compound- two or more elements bonded (joined) together to
create something new.
Key Understanding:
1. An element is a pure substance that cannot be broken down into
simpler substances.
2. A small number of elements make up the largest portion of solid
Earth, living matter, oceans, and atmosphere.
3. The atoms of an element do not have the same properties as the
element. For example the atoms of copper are not orange and