Get 3 double arm length of curling ribbon‚ tie to table leg of chair in a realisable knot. Get a 16” yellow latex and inflate with helium to 16”‚ tie off and tie to one end of curling ribbon‚ then get two 160q violet inflate fully and tie into duplex then with the joining bit of the duplex twist about a thumb length on each balloon bend it over about a thumb length and twist again‚ tie the duplex 160q with the lip shape to yellow 16” neck. Then put each end around the 16” yellow
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made by the historical reason for grouping elements in families and the electron configurations of the elements. Group 18 only contains noble gases. If you take a look at the electron configurations of each element all end in p⁶ (with an exception of Helium which is only s²). Neon’s electron configuration ends in 2p⁶. The two represents the period it is in and the six tells us that it is in the sixth column of block “p”. While noble gases are grouped for being such‚ their electron configuration also
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The universe is made up of 93.5% of Hydrogen atoms‚ 6.3% of Helium and 0.2% of other elements. By looking at the spectrum of hot stars‚ upper solar atmosphere and solar wind‚ an abundance of Helium is determined. Only from the 1920s there were methods of calculating what elements were present in a gas by just observing its spectrum‚ due to the fact that different elements absorb and emit different wavelengths of light. (2) Gamow thought that nuclear fusions took place in the first minutes after
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Nobel gases are a group of six elements in group VIIIA of the periodic table; they are in the column farthest to the right. It is a collection of five elements: argon‚ helium‚ krypton‚ neon‚ radon‚ and xenon. Unlike most elements‚ the noble gases are monatomic‚ which means the element is a single atom instead of being in pairs or a combination. The atoms have stable configurations of electrons. In other words‚ under normal conditions they do not form compounds with other elements. They got there
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Element name-Helium Element Symbol-He Atomic number-2 Group name or number- Part of the noble gases in group 18 Atomic mass (to nearest thousandth)-4.003 Number of protons-2 Number of neutrons-2 Number of electrons-2 Number of valence electrons-2 List of isotopes-He3 and He4 Electron Configuration-1s2 Discovered By-Pierre Janssen Year discovered-1868 Circumstances of discovery- Janssen discovered helium in 1868 when he was looking in a telescope when he found the yellow spectrum lines of helium. It was
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" Neon is chemically inert and forms no uncharged chemical compounds. Neon is also one of those special elements that holds no negative environmental impacts. Neon is an element that is part of the Noble Gas Group. The Noble Gas Group is made of helium‚ argon‚ krypton‚ xenon‚ radon‚ and of course Neon. These gases are in Group 18 of the periodic table. Neon is also in Period 2; all elements in the same period all have similar properties. The periodic table is a table that is able to show us how
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nucleus of the simplest atom - hydrogen. A proton and a neutron formeddeuterium‚ which then formed helium. (77%hydrogen‚ 23% helium) 7.Describe what must have happened after the Big Bang. The expanding universe was foggy and opaque‚ containing energy in the form of radiation.300 000 years after the big bang‚ the universe dropped to 3000°C. This allowed the electronsto be captured by hydrogen and helium nuclei to form new atoms and elements‚ and the fogstarted to clear. As it expanded‚ radiation took
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big bang‚ the temperature of the universe have dropped to 1 billion degrees Fahrenheit‚ cool enough for atomic nuclei to form. The element hydrogen forms and some hydrogen atoms fuse to create heliums. During the fourth minute of the big bang‚ reactions took place that locked up the remaining neutrons in helium nuclei. By just over 30 minutes after the big bang‚ all of the positrons (anti-matter) had annihilated with almost all of the electrons and one in a billion left over - to produce the background
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electron shell is called the valence shell‚ and the electrons occupying this shell are called valence electrons. The chemical properties of the elements reflect their electron configurations. For example‚ helium‚ neon and argon are exceptionally stable and unreactive monoatomic gases. Helium is unique since its valence shell consists of a single s-orbital. The other members of group 8 have a characteristic valence shell electron octet (ns2 + npx2 + npy2 + npz2). This group of inert (or noble) gases
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well as reliable LNG supplier. This company has transformed this regional resource into major component of global energy-mix. RasGas has a number of managers. It operates 7 LNG trains‚ two facilities of production of sales gas and two plants of helium and long-term charter-fleet of twenty seven LNG vessels. RasGas manages construction of Barzan Gas Project as well. The Barzan Gas Project is aimed at fuelling Qatar’s major development and further contribution of RasGas to all the four pillars of
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