Ionic Bonding
13/8
It was double-block today and it was really interesting. We learnt many new things about the Atomic Model. We learnt about the difference between electronic configuration and atomic model. Although it was confusing, I felt that it was quite amazing to find out about the electrons surrounding the atom.
14/8
Today we learnt more about the atomic model and also the difference between positive and negative ions. One thing we learnt was that elements lose electron(s) and shrink in size to become a positive ion. Elements gain electron(s) and increase in size to become a negative ion.
19/8
HOLIDAY!
21/8
Today we learnt about chemical bonding. We learnt how the valence electrons from one atom can be moved to another atom so that the atoms can form a compound. It was interesting how less valence electrons from an atom would go to another atom of more valence electrons. Reminds me of diffusion. But actually, less electrons will possess less energy hence it is easier to move it to the other atom as compared to vice versa.
24/8
Today we went through the ionic bonding between elements that we did for homework. It was really interesting to see how they work. It was something like this:
I was really fascinated! The structural equation for this would be A-A if there is one more pair of X and O in between, it would be A = A and the more the number of pairs, the more the number of lines in between the two As.
28/8
Today we had another ionic bonding lesson. It was really fun today since we were asked to write our answers of the homework that Ms Goh gave us. We were supposed to draw the chemical bonding for the compounds given. The questions were:
1) H20
2) CO2
3) NH3
4) CH4
5) H2S
6) C2H6
7) C2H4
8) C2H2
9) CH3OH
10) PF3
When I volunteered to write my answers on the board, I wrote question number 5, H2S. I did it correctly except for the fact that the Sulphur atoms had to be at an angle.
1) H20
2) CO2
3) NH3
4) CH4
5) H2S
6) C2H6
7) C2H4
8) C2H2
9) CH3OH
10) PF3
When I volunteered to write my answers on the board, I wrote question number 5, H2S. I did it correctly except for the fact that the Sulphur atoms had to be at an angle.