How a Na atom ans S atom became ions.?
146629
The sodium atom has the atomic number of 11.  This means that it has 11 protons in the nucleus and 11 electrons in the space around it.\nThe most abundant isotope of sodium has an atomic weight of 23, this means that there are (23 - 11 = 12) 12 neutrons also in the nucleus.\nThe sodium atom has 11 protons, 12 neutrons and 11 electrons.\nThe sodium ion has a positive charge by loosing one of its electrons.  So the ion has 11 protons, 12 neutrons and 10 electrons.
1185774
We have used short laser pulses to examine the process by which two ground state sodium atoms cooled to 0.5 mK in a magnetooptic trap absorb two photons tuned to the atomic 3S &#92;rightarrow 3P transition to produce a molecular ion by associative ionization. The 10 ps pulses are split into two pulses with the second pulse delayed up to T = 12 ns relative to the first. For T < 4 ns we see an enhancement of the ion signal, while for T > 4 ns the signal decays with a time constant of roughly 10 ns. The first laser pulse excites the atom pair at long range to an attractive R^-3 potential from the 3S + 3P asymptote. The second pulse promotes the pair to an attractive R^-5 potential from the 3P + 3P asymptote, where associative ionization can occur at short internuclear distances. We have simulated the behavior with a conceptually simple yet accurate model that predicts an enhancement of the flux of atoms caused by longer times spent on the intermediate potential.
798854
Cause Na, Sodium has 11 electrons, its electron configuration would be 1s2 2s2 2p6 3s1
933667
You get the first answered.\nCovalent bonds are strong and don't disassociate into ions, as ionic bonds do. Watch.\nNaCl common salt, sodium and chlorine, put in solution.\n\nNa+  and Cl- they disassociate and you can follow the path of electricity Electron jumps from sodium to be accepted by chlorine. That is electron flow; conduction of electricity.
298345
The Sodium (Na) atom is much larger by comparison to the Chlorine (Cl) atom.\nThe periodic trend of atomic radii gets smaller as you move accross a row.  Since Sodium is at the start of the row and Chlorine at the end, Sodium is larger.\nThis has to due to with the largest shell holding electrons, both Na and Cl's largest shell is the 2S orbital, but since Chlorine has many more protons in its nucleus, those electrons are held more closely than those of Sodium.\n\nOn the other hand, when an atom becomes an ion, it either gains or looses an electron (protons dont change).  When Sodium becomes an ion, it looses 1 electron to become Na+ and because of this, it looses the electron in its outer shell which is making it so big (ion is smaller than the atom).\nWhen Chlorine becomes an ion, it gains an electron which goes into completing its Octet and the ion is larger than the atom.\nWhen all is said and done, the Chloride ion (Cl-) is much larger than the Sodium ion (Na+).
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NaCl IS NOT TWO ATOMS (sodium and chlorine) BONDED TOGETHER!\n\nNaCl is what is known in chemistry as an ionic salt.  That means that a very positively charged Na+ ion met up with a very negatively charged Cl- ion, and because opposite charges attract, they got close to each other in what is known as an ionic bond, which isn't really a bond, just two particles hanging out together.
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A metal (Na) reacting with a non-metal (O) will produce a ionic bond, covalent bonds are usually only formed between two non- gases
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Gain one/two electron(s):\n\nIf an atom or ion acquires another electron in a chemical reaction, it has gained an electron.  ditto for two electrons.\nExample: S has 16 electrons.  If it gains one electron it becomes a S- ion.  If it gains two electrons, it becomes a S-2 ion.\n\nSteal one/two electrons:\nIf an atom or ion looses an electron in a chemical reaction, it had to go somewhere.  That "somewhere" will be to another atom/ion.  So, the receiving atom/ion could be said to have stolen the electron.  Same goes for reactions involving two electrons.\nExample: Na reacts with Cl to produce NaCl.  Cl "steals" an electron from Na, creating Na+ and a Cl- ions.\n\n"Never ever react electron"\nI have never ever heard this phrase.  Maybe it refers to a species (atom or ion) that does not participate in the reaction.  It's valence electron(s) would not react.
798559
positive ions are formed by removing electrons from the atoms and hence the ionic radius for positive ion is always less than that of atomic radius
775039
For the groups on the table, the ion charges are\n\n          1       +1\n          2       +2\n         13      +3\n         14    +4/-4\n         15       -3\n         16       -2\n         17       -1\n\nThe ion charge equals the number of electrons gained (-) or \nlost (+) by the atom to form the ion.
664759
It's Ionic if thats what you were looking for because sodium is an alkali metal (group 1) and Iodine is a halogen (group 17). Iodine forms an I- ion (this is an anion) and Na forms an Na+ ion (a cation) so they combine on a 1:1 ratio and the formula is NaI
575353
That is simple- Just write down the the electronic configuration of the atomic number of that element. And the number of electrons in the last shell are the valence electrons.\n\nFor eg: Na(Sodium) has the atomic number 11, now there are four shells in which the distribustion takes place- namely- K,L,M,N.These shells are also known as energy levels. \n\nThe max no of electrons in K is 2, In L is 8, M is 16 and finally in N its 32.\nAnd you cant fill the next shell till the total number is completed in one shell.\n\nThere fore for Na the configuration is: K= 2 L= 8 M= 1\nAnd hence the valence electron is 1. That is only one electron partcipates in bond formation and in chemical reactions.
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Make it??\n\nMatter has protons and electrons which have a + or - charge resp. Neutrons are neutral. Imbalance of protons and electrons make ions charged according to their imbalance
1119920
Usually, the number of electrons determines the charge of the atom. The protons determines the identity of the atom (the element). Therefore, when two protons and two neutrons are emitted, you will haev a totally different element than before, not an anion (negatively charged ion or atom).
74018
Some atoms do not loose their electrons easily.  These can either share electrons (like carbon usually does) or snatch electrons from other atoms to become negative ions (like Fluorine does).  Most metallic elements easily loose electrons to become positive ions (like sodium Na - e- = Na+).
476501
it is a bond formed between opposite charged ions. positive ions are normally metals and form positive charges by donating electrons to non metals that form negatively charged ions. as opposite attracts they form the ionic bonds
742326
positive ions (a positively charged element in this case since you specified 'atoms')  To be compounds, different types of atoms must combine.