cava chem 303 s1 4.09 Bonding in Metals
Quiz yourself by thinking what should be in
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on it to display the answer.
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| Bronze is a mixture of [...] and [...]. We call such mixtures of metals alloys. | Bronze is a mixture of copper and tin. We call such mixtures of metals alloys.
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| Metals must be purified from mineral [-s] found in nature. | Metals must be purified from mineral ores found in nature.
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| An [...] is natural mixture of a metal with minerals and other impurities found within the earth. | An ore is natural mixture of a metal with minerals and other impurities found within the earth.
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| In metallic solids, a regular array of metal cations, each with a positive charge, is surrounded by a "[...]" of valence electrons that can move freely from nucleus to nucleus. | In metallic solids, a regular array of metal cations, each with a positive charge, is surrounded by a "sea" of valence electrons that can move freely from nucleus to nucleus.
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| valence electrons in metals are free to float between metal atoms and thus are called [de-] electrons. This molecular arrangement gives metals unique properties. | valence electrons in metals are free to float between metal atoms and thus are called delocalized electrons. This molecular arrangement gives metals unique properties.
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| Malleus is the Latin word for [...] | Malleus is the Latin word for hammer
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| To be malleable (hammerable) means that something can be hammered or pounded into new shapes without [...] (as metals can) | To be malleable (hammerable) means that something can be hammered or pounded into new shapes without breaking (as metals can)
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| Ionic solids tend to be [...] because ionic bonds hold the ions together rigidly. On the other hand, metallic solids are malleable. | Ionic solids tend to be brittle because ionic bonds hold the ions together rigidly. On the other hand, metallic solids are malleable.
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| Metals are malleable because their “sea of [...]” allows the bonds between metal atoms to adjust to moving those atoms around. | Metals are malleable because their “sea of electrons” allows the bonds between metal atoms to adjust to moving those atoms around.
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| “Because of the [...]” is the answer to pretty much all questions about metallic properties | “Because of the sea of electrons” is the answer to pretty much all questions about metallic properties
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| A duct is a channel or wire. To be [-ile] means something can be pulled into wires. | A duct is a channel or wire. To be ductile means something can be pulled into wires.
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| The “[...]” explains why metals are ductile. The electrons that bond metal atoms together can move around freely to accommodate moving the atoms around. | The “sea of electrons” explains why metals are ductile. The electrons that bond metal atoms together can move around freely to accommodate moving the atoms around.
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| Metals generally have high melting points… because of (you guessed it) their [...], which tend to hold them together tightly. (not always; Mercury has a low melting point) | Metals generally have high melting points… because of (you guessed it) their sea of electrons, which tend to hold them together tightly. (not always; Mercury has a low melting point)
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| Metals conduct electricity and heat well because…. [drum roll] of the [...], which can carry energy from one place in the metal to another. | Metals conduct electricity and heat well because…. [drum roll] of the sea of electrons, which can carry energy from one place in the metal to another.
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| Metals can be mixed together, usually at high temperatures, to produce metal [-s] which have slightly different properties than the individual metals that make them up. | Metals can be mixed together, usually at high temperatures, to produce metal alloys which have slightly different properties than the individual metals that make them up.
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| Sterling silver is mostly silver with a little bit of [...]… this makes it more durable than pure silver. | Sterling silver is mostly silver with a little bit of copper… this makes it more durable than pure silver.
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| Steel is an interesting allow of a metal (iron) with a non-metal ([...]). We’re not sure how people discovered this, but medieval blacksmiths made steel by pounding coal into hot iron. | Steel is an interesting allow of a metal (iron) with a non-metal (carbon). We’re not sure how people discovered this, but medieval blacksmiths made steel by pounding coal into hot iron.
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| brittle = [...] | brittle = breaking or shattering easily
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