Lesson 2 Matter
Classifying Matter
Did you know that according to the Chemical Abstracts Registry Service, there are more than 90 million unique chemical substances?
B2.2 Various chemical formulas
B2.3 Element
Knowing that, it may seem like studying chemistry is a huge, impossible task! But once we categorize matter based on similar properties, this task becomes manageable.
Matter is anything that takes up space and has mass. Matter is categorized as either a pure substance or a mixture. Pure substances contain only one material, while mixtures are combinations of substances that can be separated by physical means.
Pure substances can be further classified as elements and compounds. Elements are substances that only contain one type of particle and cannot be broken down further by chemical means. Compounds are combinations of two or more elements and these can be broken down into simpler substances (elements) by chemical means.
Pure substances can be further classified as elements and compounds. Elements are substances that only contain one type of particle and cannot be broken down further by chemical means. Compounds are combinations of two or more elements and these can be broken down into simpler substances (elements) by chemical means.
B2.4 Compound
B2.5 Solution
Mixtures can be subdivided into two categories: homogenous and heterogeneous. Homogenous (solutions) mixtures look as if they contain only one material—they look uniform. Heterogeneous mixtures are composed of different components
that are distinctly visible.
B2.6 Mixture
The rest of this lesson will focus on elements and the fundamental particle that elements are composed of—the atom.
Read This
Please read pages 12 to 15 in your Science 10 textbook. Make sure you take notes on your readings to study from later. You should focus on classifying matter. Remember, if
you have any questions or you do not understand something, ask your teacher! Practice Questions
Complete the following practice questions to check your understanding of the concept you just learned. Make sure you write complete answers to the practice questions in your notes. After you have checked your answers, make corrections to your responses
(where necessary) to study from.
- Classify each of the following substances as an element, compound, homogenous mixture, or heterogeneous mixture.
Substance Classification soil limestone (CaCO3) apple juice
orange juice with pulp gold baking soda (NaHCO3) propane (C3H8) tap water
the Bow River
oxygen air vinegar iron filings
table sugar
rusty iron
mercury milk chromium acetylene (C2H2) paper