Metals, Non Metals, Metalloids and Physical and Chemical change

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What is a physical change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include melting, freezing, and dissolving.

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What is a chemical change?

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A chemical change is a change that results in the formation of new chemical substances. It involves a chemical reaction and changes the composition of the original substance. Examples include burning, rusting, and digestion.

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What is a property of metals?

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Metals are typically malleable, ductile, and good conductors of heat and electricity. They are usually shiny and solid at room temperature (except mercury).

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What is a property of non-metals?

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Non-metals are usually brittle in solid form, not malleable or ductile, and poor conductors of heat and electricity. They can be gases, liquids, or solids at room temperature.

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What are metalloids?

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Metalloids are elements that have properties of both metals and non-metals. They are semiconductors and are used in electronics. Examples include silicon and germanium.

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What happens during ice melting?

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Ice melting is a physical change where solid ice turns into liquid water without changing its chemical composition.

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What happens during wood burning?

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Wood burning is a chemical change where wood reacts with oxygen to produce ash, carbon dioxide, and heat, resulting in new substances.

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What is an example of a physical change?

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Dissolving sugar in water is an example of a physical change because the sugar can be recovered by evaporating the water.

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What is an example of a chemical change?

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Rusting of iron is an example of a chemical change where iron reacts with oxygen to form iron oxide (rust), a new substance.

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What is ductility?

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Ductility is the ability of a material to be stretched into a wire without breaking. It is a property of metals.