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What type of crystalline solid has atoms surrounded by mobile valence electrons?
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Conductivity in a metal results from the metal atoms having?
highly mobile electrons in the valence shell
What do mobile electrons do in metals?
Well metallic Bonds are positive metal ions surrounded by mobile electrons, in the bond the mobile electrons easily slide past one another when subjected to pressure. As for ionic crysal, pressure pushes ions of like charges into contact. They repel and crystal breaks apart.
Explain what does the strength of a metallic bond depends upon?
Number of valence electrons-The greater the number of freely mobile valence electrons, the higher the charge of positive metal ion, the stronger the metallic bond. Size of metal atom or ion-The smaller the size of the metal ion, the closer the nuclei of metal cations are to the delocalized mobile electrons, the stronger the forces of attraction between the electrons and nuclei, the stronger the metallic bonds.
Name an allotrope of a non-metal which allows electricity to pass through it?
Graphite which is a crystalline allotrope of carbon conducts electricity because of the presence of free mobile electrons occassioned by their planar structure.
What nonmobile nuclei are surrounded by a sea of mobile electron?
Conduction Band
Conductivity in a metal results from the metal atoms having?
highly mobile electrons in the valence shell
What bond is iron and iron?
It's the Metallic Bonding .The iron atoms form (+ve)ions that are surrounded by a sea of mobile (delocalised) free valence electrons.
Is a metals luster is due to its valence electrons?
Most of the properties of a metal, including lustre, are due to the metallic bonding of the electrons.
Why metals good electrical conductors?
In their regular (lattice) structure, metals have a sea of free electrons. This allows the electrons to flow through the metal at will and this is what makes metals good conductors of electricity (and heat).Their mobile electrons
What are free electrons or delocalized electrons?
Not sure, but maybe you are referring to "lone pair" of electrons.
The electric current in a metal conductor is carried by?
Valence shell electrons. A metal is formed from a lattice of positive ions in a sea of delocalized electrons. These electrons are the valence shell electrons of the metal atoms and they are the ones that carry the charge during conduction.
What do mobile electrons do in metals?
Well metallic Bonds are positive metal ions surrounded by mobile electrons, in the bond the mobile electrons easily slide past one another when subjected to pressure. As for ionic crysal, pressure pushes ions of like charges into contact. They repel and crystal breaks apart.
What do valence elctrons do?
They are typically the electrons which are involved in forming bonds to other atoms (as opposed to the other so-called "core" electrons which do not interact much with other atoms or molecules. (This is for WHAT they are not what they DO) (stupid answer by the way man)
Explain what does the strength of a metallic bond depends upon?
Number of valence electrons-The greater the number of freely mobile valence electrons, the higher the charge of positive metal ion, the stronger the metallic bond. Size of metal atom or ion-The smaller the size of the metal ion, the closer the nuclei of metal cations are to the delocalized mobile electrons, the stronger the forces of attraction between the electrons and nuclei, the stronger the metallic bonds.
How is pure metal held together?
Metals are held together by metallic bonds. Metallic bonds consist of the attraction of the free-floating valence electrons for the positively charged metal ions. These bonds are the forces of attraction that hold metals together. Metals are made up of closely packed cations rather than neutral atoms. The valence electrons of metal atoms can be modeled as a sea of electrons. The valence electrons are mobile and can drift freely from one part of the metal to another. Metallic bonds consist of the attraction of the free-floating valence electrons for the positively charged metal ions. These bonds are the forces of attraction that hold metals together.
Name an allotrope of a non-metal which allows electricity to pass through it?
Graphite which is a crystalline allotrope of carbon conducts electricity because of the presence of free mobile electrons occassioned by their planar structure.
What bond has the characteristic of a sea of mobile electrons?
Metallic bonds have the characteristics of a sea of mobile electrons.
