Summary of the Topic by Walter Pérez https://padlet.com/k33permv/7bkb3orheyzyargb A quick summary of the class topic. en-us 2025-05-01 01:15:48 UTC 2025-05-01 01:19:27 UTC hello@padlet.com Summary k33permv https://padlet.com/k33permv/7bkb3orheyzyargb/wish/3432380058 All matter has physical and chemical properties that help identify and describe it. Physical properties, such as color, density, melting point, and conductivity, can be observed or measured without changing the substance's identity. For example, copper’s reddish-brown color and its ability to conduct electricity are physical properties. Density is especially helpful for identifying elements, as some substances like gold and platinum are much denser than others. Hardness, malleability, and the ability to dissolve in water are also key physical traits.

Chemical properties describe how a substance can change into a new substance through reactions. These include flammability, reactivity with acids, and corrosion. For instance, iron reacts with oxygen to form rust, and hydrogen can explode under certain conditions. Unlike physical properties, chemical properties are only observed during chemical changes, making them crucial for understanding how substances behave and interact chemically.

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