Studied by 2 people
Neon
________ is used in discharge tubes and fluorescent bulbs for displays.
Xenon
________ and Radon are the rarest elements of the group.
XeF2
________ has linear structure, XeF4 has square planar structure and XeF6 has distorted octahedral structure since it has 6 bonding pairs and a lone pair.
noble gases
All ________ have general electronic configuration ns2 np6 except helium which has ns2 configuration.
Neil Bartlett
________, at the University of British Columbia, noticed the reaction of a noble gas in March 1962.
helium
Group 18 consists of six elements: ________, neon, argon, krypton, xenon and radon.
XeO3
________ is a colorless explosive solid and has a pyramidal molecular structure.
XeF6
________ can also be synthesized by reaction between XeF4 and O2F2.
Argon
________ is used mainly to provide an inert atmosphere in high temperature.
Helium
_______ is used to produce superconducting magnets which form an essential part of modern NMR spectrometers and Magnetic Resonance Imaging (MRI) systems.
XeF4
XeF2, ________ and XeF6 are colorless crystalline solids.
fluorinating agents
They are powerful ________ and are hydrolyzed readily even in small traces of water.
Radon
________ is obtained in a radioactive decay.
Compounds of radon
________ have not been isolated but only identified (e.g., RnF2) by radiotracer technique.
Liquid helium
________ is used as cryogenic agent for carrying out various experiments at low temperatures.
volatile liquid
XeOF4 is a colorless ________ and has a square pyramidal molecular structure.
modern diving
It is used as a diluent for oxygen in ________ apparatus because of its very low solubility in blood.
noble gases
Since ________ have stable electronic configuration they have no tendency to accept an electron so they have high positive electron gain enthalpy.
Helium
________ has the lowest boiling point (4.2 K) of any known substance.
noble gases
All ________ except Radon are found in the atmosphere.
Helium
________ and Neon are also found in radioactive minerals.
noble gases
In general, ________ are least reactive.
Group 18 consists of six elements
helium, neon, argon, krypton, xenon and radon
Order of Atomic radii
Xe> Kr> Ar> Ne> He
Order of Ionization enthalpy
He> Ne> Ar> Kr> Xe> Rn
Order of electron gain enthalpy
Ne> Ar=Kr> Xe> Rn> He
He attempted to make the same type of compound using Xe and was successful in making another red color compound Xe+ PtF6
by combining PtF6 and xenon
Xenon
Fluorine Compounds
For example
2XeF2+2H2O→2Xe+4HF+O2
