What is Chemistry. Chemistry ‑ the study of matter and the changes matter undergoes. Matter ‑ something that has mass and takes up space (has a volume). States of Matter. Law of Conservation of Mass & Energy-
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Physical Properties observed or measured
without altering makeup of substance (still the same
Compounds: element combined in a
chemical rxn (reaction).
Separation by Physical Means
Mixtures: can be physically separated
Types of Mixtures
Homogeneous - the same composition throughout
Heterogeneous- varying composition throughout
Substances can undergo three types of
Compounds can only be separated chemically into elements
2 parts to a Chemical Rxn
Three Indicators of Chemical Rxn’s