A Visual Encyclopedia of the Periodic Table

179 The Halogen Group Some toothpastes contain fluorides that harden tooth enamel. Toothpaste Uses These patterns form after the ...

180 The Halogen Group This glass sphere traps pure chlorine so as to prevent any reactions with air. Forms Chlorine Cl 17 17 17 ...

181 The Halogen Group Uses against this weapon. Today, chlorine is used in many ways. Its compounds are present in everything fr ...

Ocean clean up Chlorine is a common ingredient in cleaning products, and can be used for scrubbing everything from bathroom tile ...

The two divers use chlorine twice in the cleaning process. First, they cover the thick seaweed with a sheet made of PVC, a tough ...

184 The Halogen Group Forms Bromine Br 35 35 35 45 State: Liquid Discovery: 1826 Bromine is the only non-metal that is a liquid ...

185 The Halogen Group Uses use of this element is as a disinfectant to clean water. It works better than chlorine in hot tubs as ...

186 The Halogen Group 53 53 74 State: Solid Discovery: 1811 Betadine This disinfectant is applied to wounds to stop the spread o ...

187 The Halogen Group Tennessine Ts 117 Atoms of astatine are unstable, and typically break down after just a few hours, into at ...

Krypton (Kr) becomes visible only when it is electrified. 188-189_Noble_Gases_Opener.indd 188 02/12/16 6:52 pm ...

Ne He Ar Kr Xe Rn Og Atomic structure Apart from a helium (He) atom that has two electrons in its outer shell, all other element ...

190 Noble Gases Uses Helium He 2 Helium is the second lightest element after hydrogen. This transparent gas was first discovered ...

191 Noble Gases Helium has the lowest melting point of any element. collected from underground reservoirs or is found mixed in n ...

Nebula This glowing nebula (cloud of gas and dust) is the Crescent Nebula. It is so vast that our entire Solar System would fit ...

Helium makes WR 136 hot and bright. The star once burned using hydrogen, like our Sun. Hydrogen atoms smashed together in the st ...

194 Noble Gases P u re n eo n^ in a g la ss^ sph ere Neon Ne 10 Neon is a rare element: it makes up just 0.001 per cent of our a ...

195 Noble Gases P u re a rg on in a gl as s^ s phe re Argon Ar 18 Uses Argon is the third most abundant gas in the atmosphere, a ...

196 Noble Gases Krypton Kr 36 Forms Uses 36 36 48 State: Gas Discovery: 1898 The word krypton means the “hidden one” in Greek. T ...

197 Noble Gases Xenon Xe 54 Forms Uses 54 54 77 State: Gas Discovery: 1898 Xenon is so rare that there is only one atom of this ...

198 Noble Gases Rn 86 Radon 86 86 136 State: Discovery: Gas 1900 Radon is the only natural radioactive noble gas. This element i ...