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Questions and Answers
Which property is typical of metals?
Which property is typical of metals?
- Being transparent to light
- Conducting electricity and heat well (correct)
- Being brittle and non-malleable
- Having low density
What is the result of the metallic bond between atoms or molecules of a metal?
What is the result of the metallic bond between atoms or molecules of a metal?
- Ductility and malleability (correct)
- High density
- Transparency to light
- Low thermal conductivity
In physics, how is a metal generally defined?
In physics, how is a metal generally defined?
- A substance capable of conducting electricity at absolute zero (correct)
- A substance that is always transparent
- A substance that is always ductile
- A substance with low melting point
Under what conditions can nonmetals become metallic?
Under what conditions can nonmetals become metallic?
What can cause some materials regarded as metals to become nonmetals?
What can cause some materials regarded as metals to become nonmetals?
What property of metals allows them to be drawn into wires?
What property of metals allows them to be drawn into wires?
What temperature is typically associated with a substance capable of conducting electricity in physics?
What temperature is typically associated with a substance capable of conducting electricity in physics?
What is the result of the metallic bond between the atoms or molecules of a metal?
What is the result of the metallic bond between the atoms or molecules of a metal?
Under what conditions can nonmetals become metallic according to the text?
Under what conditions can nonmetals become metallic according to the text?
What is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, conducts electricity and heat relatively well, and is typically ductile and malleable?
What is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, conducts electricity and heat relatively well, and is typically ductile and malleable?
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Study Notes
Properties of Metals
- Metals are typically characterized by their luster, conductivity, ductility, and malleability.
- Ductility refers to the ability of metals to be stretched into wires, a result of their atomic structure and bonding.
Metallic Bonding
- Metallic bonds involve the sharing of free electrons among a lattice of metal atoms, resulting in strong interatomic attraction.
- This bonding leads to properties such as electrical and thermal conductivity due to the mobility of electrons.
Definition of Metals in Physics
- In physics, metals are generally defined as elements that are good conductors of electricity and heat and exhibit ductility and malleability.
Nonmetals Becoming Metallic
- Nonmetals can exhibit metallic properties under certain conditions, such as high pressure or when they are in specific chemical states or forms.
Transition from Metal to Nonmetal
- Some materials considered metals can display nonmetallic characteristics when they undergo structural changes, or when they are combined with specific nonmetallic elements.
Conductivity Temperatures
- A typical temperature at which a substance begins to conduct electricity dramatically is associated with its state (solid, liquid) and structure, often aligning with higher temperatures for nonmetals.
Lustrous Metallic Substances
- A substance that is freshly prepared, polished, or fractured will show a lustrous appearance, high conductivity, and properties such as ductility and malleability; these are hallmark features of metals.
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