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Classifying Matter Guided Notes
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Classifying Matter Guided Notes
Use the notes and baseball-game examples to classify matter. In particle descriptions, each colored circle represents an atom; circles touching are bonded. Word bank: element, compound, mixture, chemically, physically, fixed, separated, homogeneous, heterogeneous. Explain your reasoning when asked.
Build Your Matter Notes
1.An contains only one type of atom.
2.A compound contains two or more elements bonded in a ratio.
3.A contains substances combined.
4.The substances in a mixture keep their own properties and can often be by physical methods.
5.Which statement best describes a compound?
- It contains one kind of atom only.
- It contains different elements chemically bonded in a fixed ratio.
- It contains substances mixed together in any proportion.
- Its parts can always be separated with a filter.
6.For each model A–D, decide whether it shows an element, a compound, or a mixture. Give one particle-level clue for each choice. Each letter represents a different atom type; atoms described as bonded are touching. Model A: several separate atoms, all of the same type. Model B: several identical pairs, each made of one atom of type X bonded to one atom of type Y. Model C: separate atoms of type X together with bonded pairs of type Y atoms; the different particles are not bonded to one another. Model D: several identical groups, each made of one atom of type X bonded to two atoms of type Y.
7.In a mixture, the substances are chemically bonded together in one fixed ratio.
TrueFalse
Classify the Ballpark Samples
Madison is helping prepare snacks and equipment for a baseball game. Use what you know about matter—not just how something looks—to answer.
8.Table salt is made of sodium and chlorine chemically joined in a repeating, fixed arrangement. Is table salt an element, compound, or mixture? Explain why.
9.Caleb stirs water, sugar, and lemon juice together. The amounts can change from pitcher to pitcher, and the ingredients are not chemically bonded into a new substance. Classify the lemonade and name one reason.
10.A steel bat contains iron mixed with small amounts of other substances. For this classification task, treat steel as a mixture. What type of matter is iron itself, and what type is steel?
11.A mixture of sand and water is poured through a filter. The sand stays in the filter while the water passes through. Why can this physical method separate the mixture, but filtering would not separate the elements in a compound such as water?
12.A sample contains only carbon and oxygen atoms. Every particle has one carbon atom chemically bonded to two oxygen atoms. Is the sample an element, compound, or mixture? Use the particle arrangement to justify your answer.
13.Draw a particle model of a mixture containing an element and a compound. Use two colors for the two atom types, show which atoms are bonded, and write one sentence explaining how your drawing shows a mixture.
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