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plasma
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∙ 11y ago
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∙ 11y agoparticles
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What is the difference between covalent bonds and metallic bonds?
In a covalent bond, the electrons can be defined by the atoms they are shared between; specific atoms are bound to specific others. In metallic bonding, the nuclei "float" in a sea of electrons. the electrons here are shared by the mass as a whole, with no nuclei being bound to any specific other nuclei and no electrons bound to any particular atoms.
What is the difference between covalent bonds and metallic bond?
In a covalent bond, the electrons can be defined by the atoms they are shared between; specific atoms are bound to specific others. In metallic bonding, the nuclei "float" in a sea of electrons. the electrons here are shared by the mass as a whole, with no nuclei being bound to any specific other nuclei and no electrons bound to any particular atoms.
Is it in an atom only electrons can be moved from place to place?
Electrons, which are usually associated with the positive nuclei of atoms, can occasionally jump up or down in their orbitals, or participate in numerous forms bonding with other atoms, which requires their re-positioning; a common model for good conductors such as metals describes nuclei in fixed positions with valence electrons around them somewhat like a "sea" and not necessarily associated with any specific atom - thus free to move and thus create a current when an electromotive force is applied. Electrons are also located away from atoms, usually then termed 'dissociated' - nuclei may emit them as a form of ionizing radiation in beta decay; they may be removed by heat, radiation, or other effects; electrons are a component of cosmic rays, freely moving high energy particles in space, although they represent only a small fraction of particles which make up cosmic radiation.
What are Electrons floating in a sea of positive charge?
Orbits or orbitals
What is the combination of free electrons and atomic nuclei called?
It is called recombinations of electrons and holes due to the oposite polarity of the charges.this proces is known to be 'diffusion'. It is called recombinations of electrons and holes due to the oposite polarity of the charges.this proces is known to be 'diffusion'.
What is a positive nuclei moving about in a sea of electrols referred to?
This probably refers to plasma. However the sea of electrons analogy is usually applied to metals. The metallic bond is present in the solid and in the melt. In the solid the nuclei are fixed in a lattice, when molten they move about.
What is the difference between covalent bonds and metallic bonds?
In a covalent bond, the electrons can be defined by the atoms they are shared between; specific atoms are bound to specific others. In metallic bonding, the nuclei "float" in a sea of electrons. the electrons here are shared by the mass as a whole, with no nuclei being bound to any specific other nuclei and no electrons bound to any particular atoms.
What is the difference between covalent bonds and metallic bond?
In a covalent bond, the electrons can be defined by the atoms they are shared between; specific atoms are bound to specific others. In metallic bonding, the nuclei "float" in a sea of electrons. the electrons here are shared by the mass as a whole, with no nuclei being bound to any specific other nuclei and no electrons bound to any particular atoms.
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.
Is it in an atom only electrons can be moved from place to place?
Electrons, which are usually associated with the positive nuclei of atoms, can occasionally jump up or down in their orbitals, or participate in numerous forms bonding with other atoms, which requires their re-positioning; a common model for good conductors such as metals describes nuclei in fixed positions with valence electrons around them somewhat like a "sea" and not necessarily associated with any specific atom - thus free to move and thus create a current when an electromotive force is applied. Electrons are also located away from atoms, usually then termed 'dissociated' - nuclei may emit them as a form of ionizing radiation in beta decay; they may be removed by heat, radiation, or other effects; electrons are a component of cosmic rays, freely moving high energy particles in space, although they represent only a small fraction of particles which make up cosmic radiation.
What is the basic of bonding in a sea of electrons?
One description of the bonding in metals is positive ions in a sea of electrons--which was I think the Somerfield model. This may be what is being referred to.
Why does metalic bonding cause metals to conduct electric current?
Metallic bonding involves positive metal cations surrounded by a 'sea' of delocalised electrons. These delocalised electrons are able to move freely as they are not joined to one particular atom. Normally, these electrons are moving completely randomly and so their resultant velocity is zero. However, when a potential difference is applied, these electrons gain a small resultant drift velocity that enables them to flow as an electric current.
Why is the number of electrons more than nucleus in the sea of electrons model?
In any neutral object the number of electrons is equal to the number of protons. All metallic elements contain more than one proton in the nucleus. Therefore there will be more electrons than atomic nuclei.
What are Electrons floating in a sea of positive charge?
Orbits or orbitals
What happens to electrons after a chemical bond is formed?
If the starting point are elements then the inner shell electrons (non valence) these orbit the nuclei of the atoms and the formation of a chemical bond does not affect these materially. What happens to the valence electrons depends on the bond formed. In an ionic bond electrons are transferred from say the metal atom to the nonmetal- these electrons essentially "orbit" the nuclei of the cations and anions. They are "localised". When a covalent bond is formed the valence electrons involved are shared between the atoms, they "orbit" both nuclei. When the bond is polar covalent they spend a little more time nearer the more electronegative element. When a "delocalised"covalent bond is formed as in bezene or graphite the electrons orbit a number of atomic nuclei. In a metallic bond the valence electrons are also delocalised (the sea of electrons model) across the metal lattice, but in transition metals there is additional bonding between electrons in d orbitals (the tight bound electrons) and these electrons are essentially localised.
What supplies the electrons that will flow through the circuit?
The metals making up the circuit contain electrons themselves, and when they are together they form a conduction band (a 'sea' of delocalised electrons moving freely around positive atomic kernels) between the bonded metals. So no electrons are actually 'poured in', they are just pushed around.
What is the combination of free electrons and atomic nuclei called?
It is called recombinations of electrons and holes due to the oposite polarity of the charges.this proces is known to be 'diffusion'. It is called recombinations of electrons and holes due to the oposite polarity of the charges.this proces is known to be 'diffusion'.
