Matter: Classification and Properties

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What are physical properties of matter?

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Physical properties are characteristics that can be observed or measured without changing the substance's chemical identity. Examples include hardness, luster, boiling point, and melting point.

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What is a chemical change?

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A chemical change is a process that involves the transformation of one substance into another, resulting in a change in chemical composition. Examples include combustion, oxidation, and rusting.

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What is a chemical property?

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A chemical property is a characteristic of a substance that can only be observed during a chemical reaction. Examples include flammability, reactivity with acids, and oxidation states.

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Which state of matter has the most kinetic energy?

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Gas has the most kinetic energy compared to solids and liquids, as the particles in a gas move freely and rapidly.

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What happens during oxidation?

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Oxidation is a chemical reaction where a substance loses electrons, often resulting in a change in its chemical composition, such as when silver tarnishes.

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What is the difference between a physical change and a chemical change?

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A physical change alters the form or appearance of a substance without changing its chemical identity (e.g., melting ice), while a chemical change results in the formation of new substances (e.g., burning wood).

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What is density?

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Density is the mass of a substance per unit volume, typically expressed in grams per cubic centimeter (g/cm³). It helps determine whether an object will float or sink in a fluid.

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What is malleability?

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Malleability is a physical property that describes a material's ability to be deformed or shaped under pressure, such as hammering gold into thin sheets.

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What is luster?

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Luster is a physical property that describes how shiny or reflective a surface is, often seen in metals like silver and gold.

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What is boiling point?

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The boiling point is the temperature at which a liquid turns into vapor. For example, water boils at 100°C (212°F) at sea level.