how many valence electrons are in potassium?
912095
One, as far as I know.
347007
The valency is determined by how many electrons the atom is using to bond with another atom to form a compound. The electrons in the outermost orbit generally forms the bonds. For materials having multiple electrons in the outermost orbit the element can have different valencies. Whatever happens tends to lower the the total energy of the system to make it stable.
1026744
Valence, also known as valency or valency number, is a measure of the number of chemical bonds formed by the atoms of a given element. The concept was developed in the middle of the nineteenth century in an attempt to rationalize the formulae of different chemical compounds. Although it has fallen out of use in higher level work with the advances in the theory of chemical bonding, it is still widely used in elementary studies where it provides a heuristic introduction to the subject.\n\nIn chemistry, valence electrons are the electrons located within the outermost energy level of an atom. These electrons participate in chemical reactions. Elements with a full outer shell are very unreactive. Elements with an almost full or almost empty outer shell, such as the alkali metals and halogens, tend to be very reactive.
705262
They are all row three transitions metals.  So the point about 5 valence electrons is correct depending on the oxidation state of the atom.
884578
Electron configuration of Magnesium:\n[Ne] 3s2\n\nThus it has 2 valence electrons.
443303
It only has 7 valence electrons :)\n\nRival
740901
You need to split the ionic compounds apart to find the individual ions you would find in these structures.\n\nMgO would produce Mg^2+ & O^2- ions.\n\nK2S would produce K^+ & S^2- ions.\n\nYou can find the charge values directly from the periodic table trends for the charges atoms assume when they are ionized.
884877
Bond length = valence electrons divided by two.
960765
to attain an octet electron config.\n\nzinc has 10 electrons in its valence shell. it gives up 2 when it ionises so it can form the magic 8 that is stable. fyi, many atoms in the the table strive to attain this 8, and this principle drives the understanding of many compounds formed from the elements.
770837
1) 2\n2) 4\n3)17\n4) Ar\n5) 118\n6) metallic\n7) 92U239\n8) has its valence electron farther from the nucleus\n9) americium and curium\n10) Ne0\n11) 20\n12) neutrons\n13) 1\n14) 8\n15) +2\n16) hydrogen\n17) 18\n18) 17\n19) an ion\n20) proton
98048
H:S:S with 2 dots on top and bottom of the S. S has 6 valence electrons and H has 1, a total of 8
255162
This is because their outer-shell can hold 8 electrons based on the octet rule, but when looking at the s and p electrons in their outer level, they only have 5 electrons.  8-5 = 3 , so they can gain 3 more electrons.
259538
Cl has atomic no.17\ne.c 2,8,7\nthe valence electrons are the electrons present in the valence (outermost) shell.\nIn this case the third shell(u can count)has the several or seven valence electrons
799741
as i have explained with the formation of ionic compounds. this is an ionic compound like table salt (NaCl)\nLithium gives up the one outermost electron to Chlorine which has a stable octet.\nLithium then has just two. Remember, this is the first orbital (s orbital) with a maximum of two electrons.
224650
Atoms favor complete valence shell fulfillment and charge neutrality above all.  Since potassium has a positive center that requires 1 electron above the more stable electron orbital fulfillment, it does not require much energy to release the electron.  Since our environment consists of O2, it will react to it because a more stable configuration than the O=O configuration is the K2O.  Why?  Oxygen's center does not have enough electrons to complete the p orbital shell.  Therefore, it is not satisfied.  Thus, oxygen will share 2 electrons with another oxygen to form O2 until it has an opportunity to take 2 K electrons that potassium does not want.  Therefore, Oxygen is a lot happier than it was with another Oxygen atom who wanted the 2 electrons.  Potassium is a lot happier getting rid of the electron that it did not want.  But wait?  Why are they stuck together?  Because despited wanted to shape their electron clouds at the most ideals shapes possible, the nucleus still requires an equal amount of electrons closeby to be happy.  Thus, the only way to achieve this is to stick around Oxygen who's slightly negative.\n\nThe same could be said between Potassium and any halide, but not Potassium and any of the noble gases.  Noble gases are really happy to be complete because their electron configurations are at an ideal state - completely fulfilled.  To strip an electron would require a really high amount of energy.\n\nThus, the reasons why K likes most stuff that aren't satisfied, but not all.
774231
an octet configuration with eight valence electrons each (on each atom) ?
821051
start with carbon... carbon has 4 electrons in it's valence shell.  carbon will almost always be the central element in your compound.  \n\nfor the first one... oxygen has 6 valence electrons... a triple bond joins the 2 elements (therefore they share 6 electrons) and each element has one pair of unshared electrons... it looks like this\n    :C:::O:\nnotice that each atom has 8 electrons... and you can count the ones that carbon donated and the ones oxygen donated... maybe this will make it clearer\n    :C:;;O;    imagine that each ; is a pair of electrons from oxygen\n\nok, the 2nd one is quite easy to explain, but difficult to draw on the computer...   Carbon is the central atom, with 4 electrons.  It shares one elctron with each of the 4 other elements.  Hydrogen has 1 electron, and needs just one more to complete its shell (it is unique in this way; most need 8, but hydrogen just needs 2).  Chlorine has 7 electrons in its outer shell and needs just one more to complete its outer shell.\n\nSo, the lewis structure is drawn in a cross fashion.  \n\nHorizontally...   H:C:Cl:::\n\nVertically...   H:C:Cl:::   (where they cross at the C)\n\nSo, C has a pair of electrons on each side, and each Cl has a pair of electrons on each side (not 3 pairs on one side as I have drawn)\n\nCheck out the attached link for more help