EDJI 2000 Lecture Notes - Lecture 7: Microsoft Powerpoint, Fluorine, Trail Mix
1 Apr 2020
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Section 2. 1 models of matter: the particle theory. Particle theory is a widely believed theory of matter, which essentially states that matter is made up of small particles which are constantly moving. At a basic level, particle theory helps categorize the three main states of matter that we see everyday solid, liquid, and gas. Pure substance contains only 1 type of particle (ex. aluminum foil) Mixture contains at least 2 different pure substances (or 2 different types of particles) (ex. cookies) Heterogeneous mixture a substance in which the different components are identifiable and can be separated by physical means (ex. salad, trail mix) Homogeneous mixture a homogeneous mixture has the same uniform appearance and composition throughout. Many homogeneous mixtures are commonly referred to as solutions (ex. coffee, sugar in water) Solutions & mixtures powerpoint (parts 1 & 2) Elements pure substances that cannot be broken down into simpler substances. (water is made of the elements hydrogen and oxygen)
