General Knowledge - Chemistry - Discussion

Discussion :: Chemistry - Section 1 (Q.No.3)

3. 

The most electronegative element among the following is

[A]. sodium
[B]. bromine
[C]. fluorine
[D]. oxygen

Answer: Option C

Explanation:

No answer description available for this question.

Nancy said: (Oct 5, 2010)  
Because fluorine is small in size.

Supriya said: (Nov 26, 2010)  
If florine is small in size then what about oxygen itz atomic no is 8. Compared to florin oxygen is small.

Gladis said: (Jan 1, 2011)  
In flurine outer shell becomes 7 electrons. Hence one electron accepts from any element its outer shell will 8 electrons. So it is electronegative element.

Ruksana Khan said: (Mar 10, 2011)  
Fluorine is the most electronegative element among the given options Sodium, bromium and Oxygen because of among these elements fluorine has small element. As atomic size increases, nuclear attraction decreases, and therefore the electro negativity decreases. As we move from left to right in periodic table atomic size decreases then EN increases in 2nd period elements. The F - EN is 4.

Anamika said: (Jun 3, 2011)  
Atomic no of florine is 9 its configuration is 2,7 outermost shell contain 7 electrons it is easy to gain one 'e' to complete its octect. That's why it is more electronegative element.

King said: (Aug 27, 2011)  
Flourine has the highest ionization energy of 4.0

Rakesh Patil said: (Sep 26, 2011)  
@Rakesh/king

Because florine is more electronegativity than other molecule.

Ganesh said: (Oct 6, 2011)  
The reason is that flourine is to the right in the periodic table, as we know that when we move from left to right in PT electronegativity increases.

Saissingh said: (Dec 9, 2011)  
Since the a flourine have smallest size and require 1 elec to complete a outet state.as we move R-L of periodic table electro-neg decrease.

Gopala Krishnan said: (Jan 20, 2012)  
F is the most electronegative element compare with other elements... due to
1.from L-R atomic size decreases, electronegativity increases because of nuclear attraction increases...
2.its e-configuration is 1S2 2S2 2P5... in p shell having 5e- it will be get another 1e- its formed octet(8e-) configuration as well as stable... so its easily attract e-.....

Vinoth said: (Jan 22, 2012)  
Electronegativity is defined as the phenomenon where the ability of an element to pull shared pair of electrons towards itself.

As we move across the group in the periodic table, electronegativity increases and as we move down the group it decreases. Flourine is the last element placed before noble gases in the periodic table. Its electron config is 1s22s22p5. Owing to its small atomic size (than oxygen) , flourine atom has a higher tendency to pull shared pair of electrons towards itself.

Mad said: (Apr 3, 2012)  
Because of presenting in the halogen group it having the higher electron negativity. Fluorine is in small size so it wants only one electron for this it is the strong oxidizing agent.

Rahul Kumar said: (Apr 13, 2012)  
Because it is a halogen & halogens are more electronegative than other elements.

Kumarimanojkumar said: (Apr 16, 2012)  
Fluorine consists of negative oxidation states than other halogen elements. So that it considered as the most electronegative element.

Okoh Adem said: (Apr 25, 2012)  
Flourine is d most electronegative because its outer most shell has 7electrons which therefore makes it react easily with other elements in other to achieve an octet structure.

Vishnu said: (Apr 30, 2012)  
While going to the right side the size of the atom is decreasing, hence the size of the oxygen is higher than fluorine. Also to obey the octet rule fluorine needs one more electron. All these makes fluorine more electronegative than oxygen.

Nagaraj said: (Jul 2, 2012)  
Atomic no of florine is 9 its configuration is 2, 7 outermost shell contain 7 electrons it is easy to gain one 'e' to complete its octect. That's why it is more electronegative element.

Jubilee Kessie said: (Jan 7, 2013)  
F because, electronegativity increase across the period and decrease down the group. But F and O are of the same period with atomic numbers 8 and 9 respectively and since F has a higher atomic no than O, hence F is highly electronegative than the other elements.

Naveen Krishna said: (Jan 14, 2013)  
Most electronegative element is F. No, it is not the element with highest electron with highest electron affinity because of its very small size.

Shilpa said: (Jan 29, 2013)  
F is the most electonegative element and its electronegativity 3.98.

Satish Pal said: (Mar 4, 2013)  
F is most electronegative element because it size is very small.

Tamizhselvan said: (Apr 3, 2013)  
Because eletronegative increase across the period and decrease down the group.

Clemzy said: (Apr 8, 2013)  
Flourine is the most electron nagetive, because it has 7 valence electron in its outmost shell and need 1 electron to gain an octet structure, this makes it to react easily with the alkaline metal of group 1 elements and other metals.

Jimmy said: (Jul 30, 2013)  
Electronegative means tendency to attract electron. Electronegativity increase with increase in nuclear charge. Due to this fact option C is right answer.

Yogesh said: (Aug 23, 2013)  
Na is highly reactive than Fe and hence it is not used. Instead Fe is used which easily displace Cu.

Shivram Maddheshiya said: (Sep 12, 2013)  
F is found right side to that of these three.according to p-T element who is L-T have large electronegativity and o is back to F .

Ravi Kumar said: (Sep 25, 2013)  
Fluorine has smallest in size for complete its octet it is use one electron in outer most cell so it is greater electronegativity.

Azar said: (Oct 12, 2013)  
Fluorine has very small element so fluorine more electronactive.

Brittany said: (Oct 29, 2013)  
Whenever an electron is gain it becomes negative it now has a charge of-1 and fluorine gain electron to become stable so it is electronegative.

Zain-Ul-Rubbab said: (Jan 22, 2014)  
Fluorine is the most electonegitive element as it has small size.

Mani said: (Feb 8, 2014)  
Because fluorine is halogen and all halogens are more electronegative. (2) it obeys octet rule and from its electronic configuration 1 electron is less to cmplt da octet. So it is electronegative.

Dinesh said: (Feb 27, 2014)  
Valency of f is 7. So it need 1 electron to complete their octet so f is more electro negative.

Jency said: (Apr 16, 2014)  
It shows more electronegativity.

Hemant Kumar said: (May 22, 2014)  
Because Effective nuclear charge in F is larger.

Priya said: (May 22, 2014)  
Electronegativity decrease down the group while increase along a period.

Nancy said: (Jun 15, 2014)  
Because F is 17 group i.e. halogen group. F is very small size than octet to complete is one electron gain. Thus Fluorine is most electronegativity than other element.

Kartik Gujjar Shahpur said: (Jul 16, 2014)  
Its size is small and has high attraction between nucleus and electron so it gain electron of other element very quick and become negatively charged.

Yurme said: (Jul 20, 2014)  
Halogen family has the higher electronegativity and among the halogens Fluorine has the highest.

James said: (Sep 28, 2014)  
F is the answer because electronegativity increases across the period and decreases down the group. Fluorine has a value of 3.98 from Pauling scale which decreases down the group.

Priyanka said: (Feb 11, 2015)  
Because the electro negativity of fluorine is high and atomic radius is small.

Gospel Truth said: (Mar 6, 2015)  
As atomic number increases the force of attraction b/w the nucleus and the outer most shell increases. So it gains electrons from other elements and become electro-negative.

Santosh Vishwakarma said: (Apr 15, 2015)  
When we go to the left to right in periodic table atomic sizes are decrease and electro negativity are increase.

Charan Shetty said: (May 8, 2015)  
Fluorine has higher electro-negativity due to high polarity of fluorine atom. Polarity ratio charge. And size. So inversely proportional to size, smaller size high polarity.

Kibrom said: (Jul 8, 2015)  
As we go in the periodic table from right to left electonegativity decrease and as we go from upper to down in the periodic table electronegativity increase.

Precious said: (Sep 24, 2015)  
Ok it cause the element is highly electronegative.

Mnuthamil said: (Sep 30, 2015)  
Atomic size is small.

Vicky Richariya said: (Dec 1, 2015)  
Electronegative higher fl.

Krish said: (Dec 3, 2015)  
Fluorine is the most energetic element among all.

Aaliya Khan said: (Dec 29, 2015)  
Fluorine is the most electronegative element than other options as it has more tendency to attract the electrons toward itself.

Siddhath said: (Jan 3, 2016)  
@Supriya.

I think you don't know about the trends in the periodic table atomic size decreases as you go from left to right and as the number of protons increase of electrons increases attraction increases therefore oxygen is bigger than fluorine.

Heisenberg said: (Jan 30, 2016)  
Because of the high nuclear charge and smaller charge it become the strongest electronegative element.

Ayo said: (Feb 6, 2016)  
The electronic configuration of oxygen is 2, 4. So it can accept 4 electrons to fill up its outermost shell making it more negative.

Odunayo said: (Feb 12, 2016)  
Fluorine is an electronegative element cause it accept extra electron to fill it outermost shell.

Goke said: (Mar 17, 2016)  
Fluorine is nonmetals and it accept electron from metals.

Dnyaneshwar K Gote said: (May 29, 2016)  
Because an electron gain enthalpy and becomes more nagative from left to right.

Addition of an electron in 2p-orbital leads to a greater repulsion when atomic size is very small as in f.

Dnyaneshwar K Gote said: (May 29, 2016)  
Because an electron gain enthalpy and becomes more nagative from left to right.

Addition of an electron in 2p-orbital leads to a greater repulsion when atomic size is very small as in f.

Biswa said: (Jun 20, 2016)  
Fluorine has more electronegative than other element because its small in size.

Sahana Kc said: (Jul 24, 2016)  
What about oxygen? Oxygen is smaller than fluorine.

Himanshu Gupta (Chemical Engg.) said: (Feb 23, 2017)  
Oxygen is smaller in size as compare to fluorine but oxygen has 2 electrons in its balance shell which is difficult to gain and fluorine has only one electron it can gain it easily need less energy as compared to oxygen. Thus fluorine is more electronegative.

Kheni Pratik said: (Apr 9, 2017)  
Thanks for the valuable information.

Shaheen Anam said: (Jun 7, 2017)  
Florine is most electronegativity due to small size. In periodic table going to left to right atomic size decreases & electronegativity increases. As we move right to left of periodic table EN decreases then atomic size increases.

Munivel said: (Aug 13, 2017)  
Flurine is a chemical elements we known but atomic size decrease and nuclear charge increase due to gain of two electron because attraction force nucleus and adding electrons.

Mokkala Pradeep said: (Aug 29, 2017)  
Fluorine is the most electronegative compound among all the elements.

Mokkala Pradeep said: (Aug 29, 2017)  
Fluorine is the most electronegative compound among all the elements.

Ajay said: (Sep 5, 2017)  
Flourine is a member of group 17 called halogen group which is most eletronegetive group.

Rajyadav said: (Nov 5, 2017)  
Fluorine atomic number is but reason fluorine outermost electron present in 7 Electronic configuration is 2, 7..

Xyz said: (Nov 29, 2017)  
Fluorine have the tendency to accept the electron. It's outermost cell has 7electrons it need 1more electron to go for noble state so it accept one electron and after accepting the electron number of protons will be 9 and number of electron will be 10 then by subtracting protons and electrons of fluorine after accepting will be equal to -1so there will be formation of anion and the fluorine is electronegative element among them.

Alinaitwe said: (Jan 16, 2018)  
Fluorine requires 1 electron compared to another element.

Christopher said: (Feb 13, 2018)  
Flourine because electronegative means that, the most non-reactive non-metal.

Josh West said: (Aug 9, 2018)  
Electronegativity is high in non-metals than in metals flourine is the most electronegative because it's a non-metal, it has 7electrons in it outer most shell and can easily accept 1 electron to obtain an octet state.

Gunjan said: (Sep 25, 2018)  
Fluorine is more electronegative because its ion is -1 while oxygen is -2. The lesser the electronegative charge the more electronegativity.

Clifford said: (Oct 8, 2018)  
Fluorine is more electronegative because it gains one electron to be stable.

Gangaraju said: (Dec 8, 2018)  
Because the fluorine atom is small in size.

Chriti said: (Sep 20, 2019)  
Because fluorine is the only element that accepts 1 electron to complete its outermost shell therefore making it highly electronegative.

Sarath Sfc said: (Oct 24, 2019)  
Fluorine is the correct answer.

Electronegativity increases across a period(left to right) and also decreases down a group.

So the general trend is diagonally across the periodic table from left to right(excluding the noble gases).

Fluorine is the most electronegative element and also the most reactive non-metal.

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