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Why is so much emphasis placed on valence electrons?


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Answered 2010-11-23 03:23:28

The valence electrons of an element are mainly what determine an element's properties.

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Nitrogen has 5 valence electrons.


Curium has two valence electrons.


The element Sulfur has 6 valence electrons. : )



Beryllium has two valence electrons.


The amount of valence electrons in an atom of an element is the amount of electrons placed at the outermost ring of the atom. http://www.electronics-microcontroller.com/electronics-articles-basic-Structure-of-the-Atom.htm


Nitrogen has 5 valence electrons per atom.


It has 8 valance electrons.


Lanthanum has 3 valence electrons


the number of valence electrons in the atom's outer shell how much the valence electrons are shielded from the nucleus


Valence electrons, those electrons in the outer shell of atoms, have lower ionization energies than inner electrons have. It doesn't take as much energy to remove valence electrons from a given atom as it does to remove electrons from closer-in orbitals.


Valence electrons are the electrons in the outer-most shell of the atom. These are typically the electrons involved in forming bonds with other atoms (as opposed to the other so-called "core" electrons which do not interact much with other atoms or molecules.)See the Related Questions links below for more information and for how to count the valence electrons of an atom.Any electrons located in the outer shell of an atom are known as valence electrons.Valence electrons are electrons present in the outermost shell of an atom.


Valence electrons are the outermost (and therefore most weakly held in orbit) electrons in an Atom. It is because of these electrons that we are able to get compounds through the binding of elements. The valence electrons also give an indication of HOW these elements will react (example: an element very few valence electrons will be much more unstable, and more apt to react, than ones with fuller valence clouds.)


xenon is in the 18th group so therefore it has 8 valance electrons.


Chlorine has seven (7) valence electrons and seventeen (17) electrons total in its ground state (not an ion or isotope).


No sodium has 11 electrons which means its valence are in the 3s2 orbit while Calcium has 20 electrons its valence electrons are in the 4s2 orbit which is much larger in terms of atomic radii


An atom with less than 8 valence electrons is much more likely to form bonds than an atom with 8 valence electrons.Both of them are more likely to form bonds than an atom with more than 8 valence electrons, because at least those with 8 and less than 8 actually exist.


Generally speaking, the column or "group" usually defines the number of valence electrons an atom has, ignoring the transition metals, lanthanides and actinides. Valence electrons are the electrons available for use in bonding and not in a completed electron shell. The row or "period" really doesn't say much about valence electrons or electrons in general, as you go down the rows the atoms get larger (speaking of atomic weight) and thus have more electrons.


Bromine would have to gain one electron in order to obtain a full outer shell of electrons.


Chlorine atoms have 7 valence electrons and need only 1 more in order to become stable (having 8 valence electrons). It takes much less energy to add an electron to a chlorine atom than it does to remove 7 valence electrons, so the chlorine atom gains one electron and becomes a negative ion with a 1- charge. The same thing is true of oxygen, except that it has 6 valence electrons, so it will gain 2 electrons and becomes a negative ion with a 2- charge.


Nitrogen has 5 valence electrons, if that's what you're asking, but it's unlikely for a nonmetal to lend electrons so much as it shares with another nonmetal.


Atoms join together to make compounds because the compounds made are more stable than the what it was before (atoms). It has much to do with interactions of the electrons. Atoms become stable when the achieve octet valence electrons (8 electrons in in outer most shell). Although most atoms (besides noble gases) do not have the stable octet valence electrons to start off with, when compounds are made, the octet valence electrons is made most of the time.


Three. For more information on Yttrium, go to http://en.wikipedia.org/wiki/Yttrium.


electronegativity is a measure of how tightly elements hold on to valence electrons in a covalent bond. (Nobel gases are excluded from this pattern). before we can understand this it is important to note the pattern involving atomic radius. as we descend the periodic table the elements get bigger, as a result the valence electrons are farther away from the positive mass (protons in the nuclei) so there is less attractive force holding them. As we move left to right atoms generally have more valence electrons as we approach the Nobel gases (exclude transition metals for now). The octet configuration for the valence shell tells us that each atom strives for 8 valence electrons. If we look at the valence electrons of magnesium for example, we find 2 valence electrons on this element. it would be much easier for Mg to loss its electrons than hold onto six more. likewise if we look at a halogen (chlorine) it has 7 valence electrons and since it is very close to the octet, it holds tightly onto those electrons. If we put these patterns together we find that Florine is the most electronegitive and francium is the least.


An element whose atoms have eight valence electrons each is much less reactive, because such an element already has the energy-minimizing electron configuration, a closed octet, that other elements achieve by reaction with one another. Elements with seven electrons in each valence shell have a strong drive to abstract another one from a less electronegative atom such as a metal.



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