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Unit One- Introduction to Chemistry

matter anything that takes up space and has mass
chemistry the study of the structure, properties, and composition of substances, and the changes that substances undergo.
physical property a quality of a substance that can be observed or measured without changing the substance's chemical composition
mixture a physical blend of two or more substances that are not chemically combined.
element a substance that cannot be changed into simpler substances under normal laboratory conditions
compound a substance that can be separated into simpler substances (elements or other compounds) only by chemical reaction.
chemical property the ability of a substance to undergo chemical reactions and to form new substances
energy the capacity for doing work; it exists in several forms, including chemical, nuclear, eletrical, radiant, mechanical and thermal energies.
What are the steps of the scientific method? Observation -> Hypothesis -> Experiments -> theory
What is the difference between homogenous and heterogeneous? A heterogeneou mixture is not a uniform composition, but a homogeneous mixture is uniform/the same
What are the 5 probable sings of a chemical change? 1.color 2.bubbling(making gas) 3. the making/breaking down of a solid 4.temperature 5.oder
Describe elements' atoms they are the same
Describe compounds' atoms different atoms
Describe mixtures' atoms different atoms that are not chemically combined
What is the relative volocity of a liquid? The molecules are farther apart and move faster then the molecules of a solid
What is the relative volocity of a gas? The molecules are futher apart and move even faster that the molecules of a liquid.
carbon element
nickel element
copper element
oxygen element
aluminum element
carbon dioxide compound
water compound
baking soda compound
table sugar compound
air mixture
plastics mixture
fabric mixture
wood mixture
well water mixture
bottled water mixture
a nickel mixture
a penny mixture
brass mixture
bronze mixture
baking powder mixture
steel mixture
physical properties color, solubility, odor, hardness, density, melting point, and boiling point.
Chemical properties rust, rot, burn, decompose, ferment, expode, and corrode
Created by: Jen Walls