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Today was quite a bad day... My phone fell straight on the floor when it vibrates! Lols. It was so loud! Anyway...
Halogens are highly reactive, and as such can be harmful or lethal to biological organisms in sufficient quantities. This high reactivity is due to the atoms being one electron short of a full outer shell of eight electrons. They can gain this electron by reacting with atoms of other elements. Fluorine is the most reactive element in existence, attacking otherwise inert materials such as glass, and forming compounds with the heavier noble gases. It is a corrosive and highly toxic gas. The reactivity of fluorine is such that if used or stored in laboratory glassware, it can react with glass in the presence of small amounts of water to form silicon tetrafluoride (SiF4). Thus fluorine must be handled with substances such as Teflon, extremely dry glass, or metals such as copper or steel which form a protective layer of fluoride on their surface.
Both chlorine and bromine are used as disinfectants for drinking water, swimming pools, fresh wounds, dishes, and surfaces. They kill bacteria and other potentially harmful microorganisms through a process known as sterilization. Their reactivity is also put to use in bleaching. Sodium hypochlorite, which is produced from chlorine, is the active ingredient of most fabric bleaches and chlorine-derived bleaches are used in the production of some paper products.
My marks are definitely lower than Yong Jie and Alif... Well... A lose is a lose. I'll work harder during the holidays, so that i'll catch up with them. I'll work extremely hard! Win you all is very hard, but i'll try! Hehs. That's all.
I've gotten over you, not even your existence is left in my memory.
At the same time, i'm still counting. Wuhan's trip! Waiting for you! :D
Hmm... Let's see... About 1 years 6 months? >.<
Walking the path of heaven, the one who will rule over everything.