Dead tired >_<

My friends and I went to McDonald's after swimming lesson. I had my Grilled Chicken Foldover (it sort of grew smaller) EVM. So we decided to kill time and go to the Ang Mo Kio Library. There were quite a lot of people and we met our Secondary 1 art teacher. We just hanged around for awhile and went to Courts.

My eyes were fixed on a white (it would be better if it was black) Sony Ericsson handphone 'cause it looks so cool! However, the price was killing - $600+!!! We walked around looking at TVs and left for my friend's house after quite some time. A few matches of basketball, game boy and back to home.

After that, my brother gave me Science tuition on Atoms, Molecules and Ions. Just in case you did not pay attention and I may forget about it, here's what it is all about.

An atom is the smallest particle of an element.
The Periodic Table of Elements key is just on the left.
The atomic number, number of protons = electrons,
the symbol and the atomic mass, take atomic mass minus (-) atomic number to find the amount of neutrons an atom has.


An atom is made up of the nucleus (protons - positive electric charge, neutrons, no charge) and electrons(negative electric charge) which are orbiting around the nucleus. These electrons are orbiting on shells and you can tell how many shells an atom has through the Periodic Table. Atoms of elements which are on the first period (row) of the Periodic Table has 1 shell, the second period - 2, third - 3 and so on... The atoms in the outermost shell of an atom are called valency electrons. In order for an atom to be stable, the outermost shell must be full or must have the maximum amount of electrons it can have. The atom you see above is probably Carbon, group 4 (IV). 6 protons, electrons and neutrons.

It sure is getting quite late, lets move on to ions. Ions are atoms which are no longer electronically neutral and a charged particle. An atom becomes an ion when it takes in or gives out electrons to achieve electronic stability. The electrical configuration tells us how many electrons there are in each shell, the first number before the dot is shell one, and so on. The last outermost shell number should correspond to the group number in the table. For example, Na - Sodium is found in group 1, period 1, Na's electrical configuration will be 2.8.1 and it gives away 1 electron for it to be stable. Formula if ion will be Na⁺.

My post is growing rapidly, I'll continue tomorrow and this lame stuff is for you.