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chem303.s1.d49
cava chem 303 s1 4.09 Bonding in Metals
Question | 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. |
Metals must be purified from mineral [-s] found in nature. | Metals must be purified from mineral ores found in nature. |
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. |
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. |
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. |
Malleus is the Latin word for [...] | Malleus is the Latin word for hammer |
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) |
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. |
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. |
“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 |
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. |
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. |
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) |
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. |
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. |
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. |
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. |
brittle = [...] | brittle = breaking or shattering easily |