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Answered 2013-10-15 14:07:45

A potassium atom "always" loses exactly one valence electron when it reacts with another element, because one valence electron in a potassium atom has a much lower ionization energy requirement than any other electron in the same atom. (This property is generally ascribed to the fact that when a potassium loses exactly one electron, it acquires the very stable electron configuration of the noble gas argon.) A chlorine atom has a very strong attraction (its electronegativity) for exactly one electron, which gives the charged atom the electron configuration of an argon atom. Therefore, when a potassium atom is close enough to a chlorine atom, one electron is transferred between to form an ionic bond and a formula unit of the compound potassium chloride.

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Potassium = K and has 1 valence electron. Chlorine = Cl and has 7 valence electrons. When bondeded (metal always is listed first): KCl

The only time a valence electron is removed from its orbital is when a bond occurs. But a valence electron will always be a valence electron otherwise.

Yes, but valence electrons are always in the outer electron shell of an atom.

Chlorine is always a negative ion, thus it has gained an electron. There's more there than in a neutral atom.

When chlorine becomes chloride, the chlorine gains an electron to form an anion. This process is called oxidation. Oxidation always occurs with reduction (loss of an electron from another substance) in an oxidation reduction reaction.

A neutral atom of samarium has 2 valence electrons. If you write out the electron configuration of samarium, you will find that all of the shells up to four are full. When you get to shell five you have two electrons left. These are the two valence electrons. You can always find valence electrons by the electron configuration.

valency of carbon is positive as it gives it electron so it is positively charge

Ionization of potassium (K) results in a positive ion, K+, which has the electronic configuration of Ar. The ionization of chlorine (Cl) results in a negative ion (Cl-), also with the electronic configuration of Ar. Adding an electron always increases the size of an atom, and removing one always decreases its size.Note that both K+ and Cl- have the same number of electrons, but Cl- is larger than K+, because they are not as tightly held to the nucleus in Cl- because it has 2 less protons than potassium does. The size of the electron cloud determines the size of the atom and with fewer positively charged protons to pull the same number of electrons in close to the nucleus the electron cloud is larger for Cl-.

Because valence electron are always in the outer most layer (here the N number). You would think that the valence would come from the D orbital but if you look attentively, there will always be a S orbital with a higher N number. Example: Sc 1s2 2s2 2p6 3s2 3p6 4s2 3d1 The valence electron will always come from the 4s2 subshell, and as you go along the period, the electrons are going to add up only in the 3d orbital.

If an atom has 7 valence electrons and another atom has one valence electrons. the atom with more valence electrons will always bond with atom with less electrons. inorder to fill its last orbital

They are called ions because they have an electric charge. The sodium gives up its (valence) electron so it gains a positive electrical charge. The chlorine gains this extra electron so it gains a negative electrical charge. IONS always refer to particles WITH AN ELECTRICAL CHARGE.

the element with seven valence electrons will be more reactive. The reason for this is that elements want to always want to have a full valence shell (they always want 8, like a noble gas). The element with eight valence electron is happy with its full shell and will not want to get rid of any electrons.

The valence level is always full. It can not give away an electron or gain an electron. The outer most energy level or sublevel is filled with the maximum number of electrons.

Because they want to be happy, since that noble gases' valence electron is always full.

positive (+ is always positive) This means it's an ion, because it's lacking one valence electron

u know how Li has one valence electron and then on the other side were neon and stuff is and how it has a full outer orbital because as u read 4rm left to right the group/family will always have the same valence electron

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The magnesium has 2 valence electron while the oxygen misses 2 electron to complete its octet. An atom is always more stable when it has 8 valence electrons. The magnesium will create an ionic bond with the oxygen by giving its 2 electrons to form Magnesium Oxide, MgO.

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all the elements of group 1 have only one valence electrn so they donate one electron and are always 1+

chlorine gas is always green in colour.

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