Describe the correct electron dot diagrams for the first ten elements of the periodic table.

Question

doc.brown · Answer

Hmm, draw is not working

wolfe8 · Answer

@doc.brown I suggest sketchtoy.com

doc.brown · Answer

Hydrogen has one electron, it's somewhere inside a sphere around the proton.
You can represent it as a dot wherever you like around the letter H.

 .
H

doc.brown · Answer

Helium has 2 electrons.
He:

Now the first sphere is full and the electrons will start joining the second shell.  A higher energy level.

doc.brown · Answer

Lithium has 3 protons, so will be balanced with 3 electrons.
The first two fill up the first sphere, called the s orbital, and the last electron will go to the second sphere, 2s.
Only the outer orbitals are used in chemical bonding so we only need to keep track of those electrons.  In this case we have one valence electron.

 .
Li

doc.brown · Answer

Beryllium fills up 2s. So 1s has 2 and 2s has 2.  Two are valence electrons.

Be:

doc.brown · Answer

Boron 1s2 2s2 and a new type of orbital, the pi orbital, which is sort of figure 8 shaped.  Imagine 2 balloons. The pi or p orbital is still in the second energy level so we say 2p.  Now that's 3 valence electrons.

  .
. B .

anonymous · Answer

nitogen

N.

doc.brown · Answer

Carbon 1s2 2s2 2p2.  That's two in the sphere, two in the pi.

I can't really draw this one.  Just write a C with a dot on top one on each side and one on the bottom.

doc.brown · Answer

ok I'm tired now

anonymous · Answer

oxygen 8 electons 
k shell 2 
mshell 6         
therefore  O:

anonymous · Answer

thank you so much !!

anonymous · Answer

no problem by the way i just assisted doc.brown

doc.brown · Answer

Look at ptable.com
It will show you what all the orbitals look like.

anonymous · Answer

thank you to @donmath

doc.brown · Answer

Oxygen is

  ..
: O :

anonymous · Answer

thanks @doc.brown

anonymous · Answer

but dont you think that only valenece es are used

doc.brown · Answer

Oxygen has 6 valence electrons 2s2 2p6.  We ignore 1s2.

anonymous · Answer

oxygen needs ony 2 es to attain nearest noble gas conf like that of neon

doc.brown · Answer

True

doc.brown · Answer

If an oxygen atom has two extra electrons it has a charge of -2, and you would draw it

  ..
: O :
  ..

anonymous · Answer

ok