Part 3 of Chapter 1 in Chemistry

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It was discussing Matter so on page 5 of the book it says, "In general, then: Mixtures 1. Composition is indefinite (generally heterogeneous).*(Example: marble 2. Properties of the constituents are retained. 3. Parts of the mixture react differently to changed conditions. Distinct Substances Elements 1. Composition is made up of one kind of atom. (Examples: nitrogen, gold, neon) 2. All parts are the same throughout (homogeneous). Compounds 1. Composition is definite (homogeneous). (Examples: water, carbon dioxide) 2. All parts react the same. 3. Properties of the compound are distinct and different from the properties of the individual elements that are combined in the makeup. Remember Mixture can be separated by using component properties. *Solutions are mixtures, such as sugar in water, but since the substance, like sugar, is distributed evenly throughout the water, it can be said to be a homogeneous mixture." Then the book shows a chart with a classification scheme for matter using boxes, but Grandma will just show the separation of wording as follows: Matter Yes, Can it be physically separated? No Mixture Distinct substance Yes, Is the composition No Yes Can it be decomposed No uniform? by ordinary chemical means? Homogeneous Heterogeneous Compound Element mixture mixture (water, sodium (gold,chlorine, (air, sugar in water, (granite,wood, chloride, sucrose) oxygen, tin) stainless steel ) blood) In the next lesson Grandma will go into Chemical and Physical Properties.