Two, to raise the outer shell total to eight electrons, like that of the next heavier noble gas.
every element wants to fill the outer shell. That means if it is at 5 electrons it wants to get to 8. If it is at 3, it wants to get to 0.
I believe you are talking about fluorine. If you are, F needs one more electron to gain a full shell.If you go to WikiAnswers for this information, that is counterproductive, because there is a much better way to do it. Look at the periodic table. Groups IA through VIIIA tell you what you need to know. IA has one valence electron, IIA has two valence electrons etc. Fluorine is in group VIIA and therefore has seven valence electrons. All atoms want eight, and thus fluorine is in need of one more.
If you're asking how will an atom with 5 valence electrons will achieve a full set of valence electrons, then the answer would be that they bond with other atoms to gain a full set of the valence electrons by sharing or gaining 3 electrons.
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.
let's use the ions Cl- and H+ forming HCl, hydrochloric acid, chlorine has 7 valence electrons and hydrogen has one, so when they form an ionic bond the valence shell is filled with 8 electrons. i hope that answered your question, I'm a chem major in college so i should know this stuff in and out but only a freshman so i don't lol ~Mau
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the electrons on their outer shell, all atoms want to gain a full valence shell.
Bromine wants to have 8 valence electrons to achieve a stable electron configuration, following the octet rule. Bromine has 7 valence electrons in its neutral state, so it typically gains one electron to reach the desired 8 valence electrons.
The electronic configuration of Tin is [Kr]4d10 5s2p2. Valence electrons are the electrons on the outermost shell of the neutral atom. Since the outermost shell is the 5th one, we have 4 valence electrons (2 of s and 2 of p)
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.
Fluorine has 7 valence electrons and should gain 1 more electron.
every element wants to fill the outer shell. That means if it is at 5 electrons it wants to get to 8. If it is at 3, it wants to get to 0.
I believe you are talking about fluorine. If you are, F needs one more electron to gain a full shell.If you go to WikiAnswers for this information, that is counterproductive, because there is a much better way to do it. Look at the periodic table. Groups IA through VIIIA tell you what you need to know. IA has one valence electron, IIA has two valence electrons etc. Fluorine is in group VIIA and therefore has seven valence electrons. All atoms want eight, and thus fluorine is in need of one more.
I want answer
Oh, dude, stable atoms typically have 8 valence electrons because they want to be all balanced and happy. It's like they're throwing a party and they need 8 cool electrons to join in on the fun. So yeah, 8 valence electrons is the magic number for stable atoms.
Magnesium has two valence electrons in its outer shell and typically loses these electrons to achieve a stable electron configuration, similar to that of noble gases. By losing two electrons, Magnesium becomes a positively charged ion (Mg²⁺). Therefore, Magnesium wants to lose 2 electrons rather than gain any.
all elements want to have a full valence shell and when an atom loses electrons it is said to become a cation.