Today

What ive learnt today?

Well, to better understand questions, find out the problem, which isnt too hard, and the purpose, which IS hard. However, the purpose helps us identify what the question is testing us and help us narrow down the formulaes or concepts involved. Also, we got homework, sienz... must complete by nx week..

Finally, must remember, sulPHate is now sulFate! Haha

Miss Jee say must do this so;

Binary covalent compounds(BNC)
Definition:Binary covalent compounds, which are pure substances that consist of two nonmetallic elements.Eg. H2O, CH4

BNCs can be recognized by their formulas, which contain symbols for only two, non-metallic elements.

Example, N2O3, is a BNC as N, nitrogen and O, oxygen are both non-metals.
The identity of an element can be indicated using the following prefixes with respect to theirsubscript;
1 - mon(o)
2 - di
3 - tri
4 - tetr(a)
5 - pent(a)
6 - hex(a)
7 - hept(a)
8 - oct(a)
9 - non(a)
10 - dec(a)

The second element is indicated by its respective root;
H - hyd
C - carb
N - nitr
P - phosph
As - arsen
O - ox
S - sulf
Se - selen
F - fluor
Cl - chlor
Br - brom
I - iod

Hence N2O3: Dinitrogen trioxide