Matter is considered a pure substance if it is composed of a single entity. Pure substances can be further categorized into two:
▪ Element →cannot be separated into simpler substances or composed of only 1 type of atom (eg. O3, Cl2)
2) Select the statements that pertain to elements. Select all the statements that apply.
a) These can be broken down by physical means.
b) These cannot be broken down by chemical means.
c) These combine chemically to form new substances; they are building blocks of matter.
d) These are chemical combinations of simpler forms of matter.
e) These are pure substances.
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