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Covalent bonds

Covalent bond

a bond between two or more atoms that is provided by electrons that travel between the atoms nuclei, holding them together but keeping them a stable distance apart. the shapes of the covalent bonds change according to the electronegativity of the elements within the bond

2 or more atoms share one or more pairs of valence electrons

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Could anyone please help with these questions? (Bio)

... the mercury atoms A. cohesion B. adhesion C. Ionic bonding D. Polar covalent bonding When 2 water molecules that are hydrogen bonded separate, ... of OH- < H+ E. Concentration of OH- > H+ Which of the following bonds requires the most energy to break (when in an aqueous solution?) A. ...

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by lindshastude
Tue May 01, 2012 3:50 pm
 
Forum: General Discussion
Topic: Could anyone please help with these questions? (Bio)
Replies: 1
Views: 6796

Protein structure

... structure is a 3d representation of a peptide chain to show how non-covalent bonds i.e ionic bonds , hydrophobic interactions , disulphide bridges and hydrogen bonds hold ...

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by ccBiologist
Thu Sep 29, 2011 8:15 am
 
Forum: Molecular Biology
Topic: Protein structure
Replies: 4
Views: 13499

Ionic bonds

... you're looking for the dielectric constant and it's effect on ionic bonds. However, I'd like to add, that bond is 100% ionic, even the bond in rubidium fluoride is partly covalent.

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by JackBean
Sun Aug 07, 2011 8:05 am
 
Forum: General Discussion
Topic: Ionic bonds
Replies: 2
Views: 5217

Ionic bonds

... is what you are looking for: Ionic crystals may contain a mixture of covalent and ionic species, as for example salts of complex acids, such as ... are of this type. X-ray diffration shows that in NaCN, for example, the bonds between sodium cations (Na+) and the cyanide anions (CN-) are ionic, ...

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by Adz795
Sun Aug 07, 2011 6:16 am
 
Forum: General Discussion
Topic: Ionic bonds
Replies: 2
Views: 5217

Proteins

1) are you sure, that urea will disrupt covalent bonds? I highly doubt, since such denatured proteins can be renatured after dialysis. 2) how is that ...

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by JackBean
Mon May 23, 2011 12:46 pm
 
Forum: Cell Biology
Topic: Proteins
Replies: 5
Views: 3561
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