It is a disulfide bond.
Disulfide Bond
Disulfide bond
Covalent crystals are atoms held together in an extensive three-dimensional network entirely by covalent bonds. Two examples are diamond and graphite (pencil lead)
Single covalent bonds are usually flexible, but when the bonds form an extended three-dimensional structure they can become very inflexible, as in diamond.
because covalent bond involve sharing pair of electrons and non covalent bond involve more dispersed variations of elctromagnetic interactions which maintain the three dimensional structure of molecule
One major reason is that the bonds are actually in three dimensional space, but most drawings utilize only two dimensions, and no two dimensional drawing can exactly and fully represent a three dimensional reality.
Solid aluminium trifluoride has a three dimensional structure which is surprisingly not well understood. It is probaly mainly ionic. AlF3 in the gas phase is covalent with a planar structure.
Covalent crystals are atoms held together in an extensive three-dimensional network entirely by covalent bonds. Two examples are diamond and graphite (pencil lead)
Single covalent bonds are usually flexible, but when the bonds form an extended three-dimensional structure they can become very inflexible, as in diamond.
because covalent bond involve sharing pair of electrons and non covalent bond involve more dispersed variations of elctromagnetic interactions which maintain the three dimensional structure of molecule
One major reason is that the bonds are actually in three dimensional space, but most drawings utilize only two dimensions, and no two dimensional drawing can exactly and fully represent a three dimensional reality.
Covalent Bonds.
covalent (peptide) bond and hydrogen bonding
Diamond is an allotrope of carbon where all the carbon atoms are tetrahedrally bonded with each other forming a three dimensional covalent network. Since the bonds are strong (covalent, network), diamond has a very high melting point and boiling point. Iodine does not have three dimensional network and hence has very low melting/ boiling point. It fact, it will sublime at room temperature.
They counteract the positive charge of the proton and keep the atom stable. Also involved in covalent and ionic bonding. Essentially massless
Protein synthesis
Solid aluminium trifluoride has a three dimensional structure which is surprisingly not well understood. It is probaly mainly ionic. AlF3 in the gas phase is covalent with a planar structure.
covalent
COVALENT