M. Singh1 Question1 Answer0 Best Answers22 PointsView Profile23M. SinghStarterAsked: October 28, 2019In: ChemistryWhy is helium in the P block?23Why does helium(He) place in the P block(periodic table)?what is valence elections in He atom?what is valency of He?What is the electronic configuration of helium(He)?is helium more stable as compared to other inert gases?is helium solid or liquid or gas?who founded helium (He)?d blockf blockinert gasp blocks blockzero groupShareFacebook2 AnswersVotedOldestRecent pramod verma3 Questions2 Answers0 Best Answers24 PointsView Profile pramod verma Starter Added an answer on October 29, 2019 at 9:31 pm I am Happy to join this group and I salute you all. I have given some details that will help you all to know more about Helium (He).Origin of Name From the Greek word helios, meaning sunAtomic number: 2Number of Protons: 2Number of Neutrons: 2Number of Electrons: 2Normal Phase: GasFamily: Noble GasPeriod: 1Group: 18Block: sAtomic mass: 4.00260 g.mol -1Density: 0.178*10 -3 g.cm -3 at 20 °CMelting point: – 272.2 (26 atm) °CBoiling point: – 268.9 °CTriple point: -271°CHeat of fusion: 0.0138 kJ/molHeat of vaporization: 0.0829 kJ/molVanderwaals radius: 0.118 nmIsotopes: 2Electronic configuration: 1s2Energy of first ionisation: 2372 kJ.mol -1Discovered by: Sir Ramsey in 1895Cost: $37.50 per 1000 cubic feet 14 Reply ShareShareShare on FacebookShare on TwitterShare on WhatsApp Praween RajNoida, India0 Questions5 Answers3 Best Answers100k PointsView Profile Praween Raj Expert Added an answer on October 30, 2019 at 8:23 am This answer was edited. What is talking here is all about the helium element. Let’s know about it in brief:It is a gaseous (Classified as Non-metal) element with atomic symbol “|He”, IUPAC Name “helium”, atomic number 2, and atomic weight 4.00. its Oxidation States is 0Existence of Helium (He) :After hydrogen(H), helium(He) is the second lightest element and the second most abundant(about 24% of observable Universe’s elemental mass) element in the universe.It is found in significant amounts only in natural gas, from which it is extracted at low temperatures by fractional distillation. It is inert and monatomic in virtually all conditions.Throughout the universe, helium is found mostly in a plasma state whose properties are quite different from molecular helium.normal state helium(He) is gas but it becomes liquid at −268.9 °C (−452 °F). And it is necessary to apply pressure of 25 atmospheres at a temperature of 1 K (−272 °C, or −458 °F) to convert it to its solid form.Properties of Helium(He) :Helium is a colorless, non-toxic, odorless, tasteless chemical element. It is the most non-reactive of the noble gases and therefore the least chemically-active chemical element on the periodic table.Helium has the lowest boiling and melting points among all elements; except in extreme conditions and it exists only as a gas. At temperatures near absolute zero, it is a superfluid (liquid).Helium is chemically non-reactive under all normal conditions due to its valence of zero.Its Inhalation causes the voice to become like Mickey Mouse’s voice. It is non-flammable and is only slightly soluble in water.Uses of Helium(He) :Helium is used in cryogenics, like a deep-sea breathing gas, for inflating balloons and airships, and as a protective gas for many industrial purposes, such as arc welding. Inhaling a small amount of the gas temporarily changes the frequency of a person’s voice.Other Uses: Filling balloons and other light aircraft, Refrigerant for superconductors, Leak-detection systems, Cooling MRI scanners, Semiconductor manufacture, and welding purposesThe compound of Helium(He):Helium can form unstable compounds with tungsten, iodine, fluorine, sulfur, and phosphorus when it is subjected to an electric glow discharge, through electron bombardment or is otherwise a plasma.HeNe, HgHe10, WHe2 and the molecular ions He2+, He2++, HeH+, and HeD+ have been created this way.In a normal state, it has no compound because it is a very stable element. By using some technique at a certain level, it allowed the production of the neutral molecule He2, which has a large number of band systems, and HgHe, which is apparently only held together by polarization forces. Theoretically, other compounds, like helium fluorohydride (HHeF), may also be possible.Production of Helium(He):Helium can be obtained by heating monazite sands at 1000°C (1832°F). It can also be produced by liquefaction of natural gas deep under the Earth’s crust. 7 Reply ShareShareShare on FacebookShare on TwitterShare on WhatsApp Leave an answerCancel replyYou must login or register to add a new answer.