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  Can you draw the Electron Dot structure of potassium and oxygen atoms? Can you show the formation of potassium oxide?

 

Potassium - Atomic Number 19Electronic Configuration (2,8,8,1) ---> 1 valence electron, Valency = 1Oxygen - Atominc Number 8Electronic Configuration (2,6) ---> 6 valence electrons, Valency = 2

Now Oxygen has 6 valence electrons, so it'd rather take 2 electrons than give away 6. But Potassium has only 1 valence electron to give, as opposed to taking 7. So, what happens is, 2 atoms of Potassium give 1 electron each to Oxygen x K -----  ,  ,  ,          x  O x   x K -----     .  .  . [K1+]2 + [O2-] => K2OSorry for the diagram, twas poorly drawn :) But I hope you understand

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 K(2,8,8,1) ----- K(2,8,8)+ + e-

O(2,6) + 2e- ------ O(2,8)

 K .

  +  :: O : -------  [ K+ ]2 +  [::O::]

 K .

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The First 20 Elements

Here is the electron dot structure for each of the first 20 elements. Only the last stage of each diagram is given, and then what it looks like when redrawn only with the outer shell.

Hydrogen: 1 electron 

hydrogen model


Helium: 2 electrons. Note that the two electrons in the first shell are put in the same quarter. This shows that they form a full pair and that there is no opportunity for the atom to bond with any other elements. 

element helium


Lithium: 3 electrons. On the right of the image below, only theoutermost shell is shown. 

lithium pictures


Beryllium: 4 electrons 

beryllium atom


Boron: 5 electrons 

boron atom


Carbon: 6 electrons 

element carbon


Nitrogen: 7 electrons 

nitrogen element


Oxygen: 8 electrons 

the element oxygen


Fluorine: 9 electrons 

the element fluorine


Neon: 10 electrons 

element neon


Sodium: 11 electrons 

sodium cloride


Magnesium: 12 electrons 

element magnesium


Aluminium: 13 electrons 

aluminium profile


Silicon: 14 electrons 

silicon properties


Phosphorous: 15 electrons 

phosphorous atom


Sulfur: 16 electrons 

element sulfur


Chlorine: 17 electrons 

facts chlorine


Argon: 18 electrons

element argon


Potassium: 19 electrons

what is potassium


Calcium: 20 electrons. Note how the electron dot structure is repeating every eight elements.

choral calcium

 
 
 
 
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 electron dot structure of potassium

electron dot structure of oxygen

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Potassium
what is potassium
Oxygen
 
the element oxygen
Formation will be as follows:-
Take two atoms of K+ as taken above and one O2-  and then tranfer the electrons of K to O
So it forms K2O !
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 formation of potassium oxide

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the diagram again

xK --  . x O. .
xK --  . . . x

The dots " . " are the electrons of oxygen, and "x" is the electron of Potassium, You need to draw the outer shell of Oxygen in a circle, with 6 dots, and 2 "x"

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 x K            ::O:

2K - xx:O::    

 

x = electrons of k

: =  electrons of o

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