Halogen

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 high electronegativity of the atoms due to their high effective nuclear charge. Because the halogens have seven valence electrons in their outermost energy level, they can gain an electron by reacting with atoms of other elements to satisfy the octet rule. Fluorine is one of the most reactive elements, attacking otherwise-inert materials such as glass, and forming compounds with the usually inert 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 (which is itself an organofluorine compound), extremely dry glass, or metals such as copper or steel, which form a protective layer of fluoride on their surface.

List of Halogens (Element Groups)

60-Watt Equivalent Halogen A19 Long Life Light Bulb (4 ...

Halogen Light Bulbs & Spotlights - All shapes & sizes ...

Philips HIR2 9012 Headlight Bulb (1-Pack)-9012LLB1 - The ...

Periodic Table Halogens | Free Images at Clker.com ...

Halogen Bulbs - Light Bulbs - The Home Depot

Westinghouse 25-Watt Halogen MR16 Clear Lens GU10 Base ...

Halogen Classic Reflector MV Halogen with Reflector ...

PrintShade 120 - Tom Dixon's Etch Shade inspired Lamp by ...

Osram Halogen Energy Saver MR16 12V 50W 60° | Light bulbs ...

Halogen Light Bulbs & Spotlights - All shapes & sizes ...

Light Bulbs: Know the Different Types | HGTV

Philips 50-Watt Halogen MR16 GU10 TwistLine Dimmable Flood ...

Halogen Classic Halogen reflector bulb 8718291122838 | Philips

17124 - 50739 - 50W 130V 2800K PAR30 Standard Products ...

Chem4Kids.com: Elements & Periodic Table: Halogens

BROMINE—PRODUCT OF A BAD NEIGHBORHOOD | Simanaitis Says

60-Watt Equivalent Halogen A19 Long Life Light Bulb (4 ...

17047 - 378059 - 50W 12V Philips EXN Halogen MR16 Lamp ...

Halogen Elements and Properties

Philips 75-Watt Equivalent PAR30L Halogen Dimmable ...

Philips 75W Equivalent Halogen PAR30S Energy Advantage ...

5 x OSRAM BRANDED MR16 50w Halogen Spotlight Lamp 12v GU5 ...

FAQ from Halogens - IIT JEE - Chemistry

CTKcom Halogen Light Bulbs(6 pack) - 12Volt 10Watt MR16 ...

50W 35W 20W HR16 MR16 E26 Medium HR-16 120V Halogen Light ...

Westinghouse 50-Watt Halogen MR16 Clear Lens GU10 Base ...

Atomic Structure and Periodic Table - ppt video online ...