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- 1.Ionic bond - Wikipedia, the free encyclopedia
- Ionic bonding will occur only if the overall energy change for the reaction is ... In an ionic bond, the atoms are bound by attraction of opposite ions, whereas, ...
- http://en.wikipedia.org/wiki/I
onic_bond
- 2.ionic bond: Definition from Answers.com
- ionic bond n. A chemical bond between two ions with opposite charges, characteristic of salts. ... Ionic bonding will occur only if the overall energy change ...
- http://www.answers.com/topic/i
onic-bond
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Ionic bond.?
Why the ionic bond of K2O is
stronger than that in Mg2O3?
Potassium have a lower
electronegativty so it is more
easy to lose electrons, but it
can only explain why it react
vigorously with non-metals and
harder to gain electrons.
Ionic bond isn't mean the
attractive of the charge only?
Cation of magnesium is +3 and
potassium is +1 only. Isn't
the ionic bond between Mg2O3
more stronger than K2O?
Sorry, it should be Al2O3 ,
not Mg
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You need to distinguish two very different things; degree of ionic character, and strength of the bond as measured in various ways. In any real "ionic" solid, there is some sharing of electrons between cation and anion (how could the "anion" electrons not be influenced by the positive charge of the cations?) So an ionic bond is an idealisation. Careful mapping of electron distribution by quantitative x-ray diffraction analysis confirms the truth of what I just said. In K2O, the electronegativity difference between the atoms is greater than in Al2O3, so the bond in K2O really is closer to being a pure Ionic bond. Exactly where we draw the borderline between "Ionic" (ignoring distortion towards covalent) and "polar covalent" is imposing a yes/no on what is really a more/less situation. However, people draw it with some confidence in between Al2O3 and SiO2. Then there is the question of bond strength. You are right in saying that this is greater in Al2O3 than in K2O, because of the attraction between O 2- and the much more highly charged (and smaller, which is also relevant) Al3+ as opposed to K+. I am not sure whether you mean the energy of interaction between the ions, termed "lattice energy", or the energy of formation from the separated atoms, or from the elements as they occur, but if you're talking about the effect of charge only (and also of size, which cannot be separated from the effect of charge), you're probably just thinking about the lattice energy. For more detail on this look up "Born-Haber Cycle". The term "bond strength" is sometimes also used to mean the mechanical strength of the bond, i.e. high force constant resisting distortion, which can be estimated from the infrared absorption spectrum. Incidentally, K2O readily reacts with excess oxygen to form K2O2 (potassium peroxide) and KO2 (potassium superoxide, containing the [O2]- anion radical). This is not really relevant to your question, but I mention it because one of the other answers does so. |
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How do i tell if it is a ionic How do i tell what type of
bond it is?, the 3 options are
ionic or covalent, or
metallic?
Here are few examples (the
numbers are suppose to be
subscripts but i don't how to
make them subscripts so just
pretend the numbers are
subscripts)
CH4 (gas)
KCI
H20 (water)
HCI
also explain how you got the
answer, thanks.
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There are alot of ways to answer this question. For instance, you could electronegativities of each element to calculate the Pauling dipole moment of the molecule and hence determine the type of bond. However, this looks like a grade school level question. The only way for you to really know which is ionic, covalent, or metallic is by knowing which elements share electrons and which transfer electrons. You should know which are metallic bonds because only transition metals like Fe (viz. iron) form metallic bonds. Covalent bonds form between elements that have similar electronegativities such as Carbon and Hydrogen ( C-H bonds). Ionic bonds form between elements of larger differences in electronegatives such as Potassium and Chlorine [K+][Cl-]. You should be able to figure the answer out from this. |
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What kind of bond does sulfur What kind of bond does sulfur
dioxide have? Is it an ionic
bond or covalent.
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Covalent, because it is a bond between two non-metals and the electronegativity difference is less than 1.7. Hope that helped! |
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