Introduction to Chemistry Matter
What is Chemistry? In your own words, please write down how you would define the following words: Biology Physics Chemistry
What is Chemistry? Biology Physics Chemistry The study of living organisms The study of forces & motion The study of matter and its reactions and properties
Matter
Elements Type of matter that cannot be broken down into simpler, stable substances and is made of only one type of atom
Compounds A pure substance that contains two or more elements whose atoms are chemically bonded
Compounds Fixed compositions A given compound contains the same elements in the same percent by mass
Compounds The properties of a compound are VERY DIFFERENT from the properties of the elements they contain Ex.) Sodium Chloride (NaCl) vs. Sodium & Chlorine Sodium:
Electrolysis
Mixtures A blend of two or more kinds of matter, each of which retains its own identity and properties Homogeneous Heterogeneous
Homogeneous Mixtures Composition is the same throughout the mixture Examples: salt water, soda water, brass A.k.a. a solution Solute in a solvent (salt dissolved in water)
Heterogeneous Mixtures Non-uniform; composition varies throughout the mixture
Separating Mixtures Filtration
Separating Mixtures Distillation
Separating Mixtures Chromatography