(c) What Is The Outer (valence) Electron Configuration Of O2-? Asked by Aashna Anith Kumar | 4th Feb, 2014, 11:50: PM. Count for the fallacy. Provide justification with suitable examples. Please explain reasons. It can be observed from the chart that there are more neutrons than protons in nuclides with Z greater than about 20 (Calcium). The electronic configuration of Beryllium is 1s2 2s2. Expert Answer: According to Molecular Orbital theory, only those molecule can exists which have net positive bond order while the molecules with negative or zero bond order will not exists. From the electronic configuration it is clear that there is no singly filled atomic orbital present in beryllium. Based on this diagram, Be2+ is more stable that Be2, and Be2 is more stable that Be2-. (b) Nickel(II) sulphate Earn Transferable Credit & Get your Degree, Get access to this video and our entire Q&A library. Favorite Answer. Calculate the amount of carbon dioxide that could be produced when. Since there is no Jahn Teller effect in Cu(I), no stabilisation occurs, so Cu(II) is more stable. Question 51 pts The LUMO of cyanide ion is:... F2, F2-, F2+ : rank from most stable to least... 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Explain why BeH2 molecule has a zero dipole moment although the Be–H bonds are polar. Stable isotopes can spontaneously undergo changes, transforming them into other isotopes of the same or of different elements. (ii) Determine the molality of chloroform in the water sample. Answer. Question: Use Molecular Orbital Theory To Determine Whether He2 Or He2+ Is More Stable. Some isotopes are very unstable and exist for less than a second; others can exist for billions of years but still be unstable. Hence be2 is neither diamagnetic nor paramagnetic as it does not exist. Good explanations it really help me to understand. Without the half filled orbital,the overlapping is not possible,therefore Be2 molecule does not exist. Write the significance/applications of dipole moment. Segre chart – This chart shows a plot of the known nuclides as a function of their atomic and neutron numbers. Sciences, Culinary Arts and Personal What do you understand by (i) electron-deficient, (ii) electron-precise, and (iii) electron-rich compounds of hydrogen? Draw the molecular orbital diagram for CIF? Diatomic Species by Molecular Orbital Theory. Define octet rule. (e) Iron(III) sulphate Stable Nuclei – Unstable Nuclei. Thus the bonding and … So it will be more stable. Molar mass of sodium acetate is 82.0245 g mol–1. Sign in. Is He_2+ Paramagnetic Of Diamagnetic? How to solve: Use MO diagrams and the bond order from them to answer each of the following questions. The electronic configuration of Beryllium is 1s2 2s2. Be2- is more stable than Be2, and Be2 is more stable than Be2+. © copyright 2003-2020 Study.com. The mass of an electron is 9.1 × 10–31 kg. Be2 is stable and paramagnetic, but Li2 is unstable. Copyright © 2020 saralstudy.com. From the electronic configuration it is clear that there is no singly filled atomic orbital present in beryllium. (b) Is Be2+ Diamagnetic Or Paramagnetic? b) Addition of one electron to give the monoanion results in pairing of one of these electrons leaving one unpaired electron. Key Terms. Unstable isotopes do not. In mathematics, engineering, ... i.e. Which out of NH3 and NF3 has higher dipole moment and why? Balance the following redox reactions by ion – electron method : (a) MnO4 – (aq) + I – (aq) → MnO2 (s) + I2(s) (in basic medium), (b) MnO4 – (aq) + SO2 (g) → Mn2+ (aq) + HSO4– (aq) (in acidic solution), (c) H2O2 (aq) + Fe 2+ (aq) → Fe3+ (aq) + H2O (l) (in acidic solution), (d) Cr2O7 2– + SO2(g) → Cr3+ (aq) + SO42– (aq) (in acidic solution), Write the formulae for the following compounds: Unstable seems to be in common use, but I have not often run across instable. (a) P4(s) + OH – (aq)  →  PH3(g) + HPO2 – (aq), (b) N2H4(l) + ClO3 – (aq)  →  NO(g)  +  Cl–(g), (c) Cl2O7 (g)  +  H2O2(aq)  →  ClO – 2(aq)   +  O2(g)  +  H + (aq). But we drew a simplified MO diagram. Answer Save. Question: Use MO Diagrams And The Bond Orders You Obtain From Them To Answer Each Of The Following Questions. All other trademarks and copyrights are the property of their respective owners. (ii) 1 mole of carbon is burnt in 16 g of dioxygen. Both has 2.5 bond order but N2+ is more stable bcz n2– has more no of antibonding electrons so less stable.. Explain with the help of suitable example polar covalent bond. It is believed that most of the stable beryllium in the universe was originally created in the interstellar medium when cosmic rays induced fission in heavier elements found in interstellar gas and dust. From the electronic configuration it is clear that there is no singly filled atomic orbital present in beryllium. The molecular orbital diagram(MO diagram) is qualitative in nature and its a very complex diagram to drawn in the paper. What are the oxidation number of the underlined elements in each of the following and how do you rationalise your results ? Both stable and unstable isotopes of beryllium are created in stars, but the radioisotopes do not last long. Does b2 contain unpaired electrons? ) The way to know it theoretically is using electronic structure programmes. Previous Question Next Question The bond order increases to 1.5. Write its significance and limitations. Diberyllium is thought to be non-existant. Stable and unstable flows. B2 has 2 unpaired electrons because of single occupancy of the degenerate pi orbitals and a bond order of one. What mass of CaCO3 is required to react completely with 25 mL of 0.75 M HCl? {/eq}? (f) Chromium(III) oxide. According to J.D Lee, compounds with fraction bond number are unstable--Li2+ BOND ORDER = 0.5 Li2 BOND ORDER =1 Hence Li2+ must be unstable than Li2 but then why Li2 is more stable than Li2+. 0 0. (a) Is {eq}O_2 {/eq} and {eq}\rm Be_2^+ Use the following MO diagram for Be2, Be2+, and Be2-. Gammy. If its K.E. Thus its MO configuration would be 1s2*1s2. 5 years ago. (iii) 2 moles of carbon are burnt in 16 g of dioxygen. Although stable and unstable angina have similar symptoms, they differ in terms of severity and when the symptoms occur. which is more stable diatomic species Be2, B2, or Ne2? Suggest structure of these compounds. For each of the following species: Be2+, F2 a) Write the molecular orbital energy diagram and fill in the electrons b) Find the bond order and state whether the species is stable or unstable c) Determine if the species is diamagnetic or paramagnetic (indicate the number of unpaired electrons) Be2- is more stable that Be2, and Be2 is more stable than Be2+. Balance the following equations in basic medium by ion-electron method and oxidation number methods and identify the oxidising agent and the reducing agent. Without the half filled orbital,the overlapping is not possible ,therefore Be2 molecule does not exist. {/eq} are drawn below. Part of this theory is the concept of bond order which gauges whether a molecular bond would be stable or unstable. Be2 is more stable than either Be2+ or Be2-. (a) Is O2 stable or unstable? In this topic, you study the Stable and Unstable Systems theory, definition & solved examples. Define hydrogen bond. bistable: something that has two stable states, i.e. 7 years ago. is 3.0 × 10–25 J, calculate its wavelength. B2 = 6e- = σ1(2e-) σ2*(2e-) π1(2e-) σ3(0e-) π2*σ4* Based on this diagram, both are stable and diamagnetic. Be2 Is Stable And Diamagnetic, Bit Li2 Is Unstable. Be2 is stable and paramagnetic, but Li2 is unstable. 53 0. Is it weaker or stronger than the van der Waals forces? Even rather simple molecular orbital (MO) theory can be used to predict which homonuclear diatomic species – H 2, N 2, O 2, etc. (c) Tin(IV) oxide Divide the result by 2 to get the result. Classification of Elements and Periodicity in Properties, Organic Chemistry Some Basic Principles and Techniques. These disturbances will relate to the initial properties of the system, such as velocity, pressure, and density. The higher the bond order, the more stable the molecule. 89 0. Relevance. Anonymous. A sample of drinking water was found to be severely contaminated with chloroform, CHCl3, supposed to be carcinogenic in nature. James Clerk Maxwell expressed the qualitative concept of stable and unstable flow nicely when he said: Services, Molecular Orbital Theory: Tutorial and Diagrams, Working Scholars® Bringing Tuition-Free College to the Community. it can be triggered from the stable state to the unstable state, from which it will automatically return after a certain period (hence unstable). Calculate the wavelength of an electron moving with a velocity of 2.05 × 107 ms–1. Be2 Is Stable And Paramagnetic, But Li2 Is Unstable. Write the favourable factors for the formation of ionic bond. Hence be2 is neither diamagnetic nor paramagnetic as it does not exist. Use MO diagrams and the bond orders you obtain from them to answer each of the following questions. I do not have a qualitative way to estimate which of those molecules is more stable. Why is be2 unstable? Calculate the mass of sodium acetate (CH3COONa) required to make 500 mL of 0.375 molar aqueous solution. Stable angina is chest discomfort, shortness of breath (or any of the symptoms described above) that happens with a predictable, reliable amount of exertion or stress, and when that pattern has been present for more that four weeks. Using s, p, d notations, describe the orbital with the following quantum numbers. Li2 is stable and diamagnetic, but Be2 is unstable. Write... 7. Create your account. Furthermore, BE2 Enduro backpack comes with a 1.5 liter Ergon BH150 bladder as well as a molded-foam back pad that ensures stability as standard equipment. The important thing is that Cu(II) is d9, Cu(I) is d10. How do you express the bond strength in terms of bond order? Show transcribed image text. (a) Is O2- Stable Or Unstable? Write Lewis dot symbols for atoms of the following elements: Mg, Na, B, O, N, Br. Our experts can answer your tough homework and study questions. This back pad can be replaced by the impact protector BP100, which is separately available. In a reaction A + B2 → AB2 Identify the limiting reagent, if any, in the following reaction mixtures. Calculate the oxidation number of sulphur, chromium and nitrogen in H2SO5, Cr2O2- 7 and NO– 3. It is noted that Be2+ coordinates four water molecules at an average distance of 0.167 nm and Mg2+ coordinates six water molecules at an average distance of 0.210 nm. Be2 is stable and diamagnetic, bit Li2 is unstable. (iii) 100 atoms of A + 100 molecules of B. Calcium carbonate reacts with aqueous HCl to give CaCl2 and CO2 according to the reaction, CaCO3(s) + 2 HCl(aq) → CaCl2(aq) + CO2(g) + H2O(l). that the load is a lot more stable than with a traditional style pack. These extra neutrons are necessary for stability of the heavier nuclei. How do you think about the answers? 1 Answer. answer! GeorgeSiO2. Be2+ and Be2- are both more stable than Be2. (a) Mercury(II) chloride Lv 7. So in order of stability you have; F2+, F2 and the least stable F2-. The electronic configuration of Beryllium is 1s 2 2s 2. According to it: A simple MO diagram explains why $\ce{Be2}$ must be indefinitely unstable. To distinguish between the different states of fluid flow one must consider how the fluid reacts to a disturbance in the initial state. {/eq} stable or unstable? The MO diagram of {eq}\rm O_2 Use molecular orbital theory to explain why the Be2 molecule does not exist. Your question is wrong because be2 molecule does not exist as be2 number of electron is 8 so according to MOT its bond order comes out to be zero. Secondly, is be2 stable or unstable? This website explains how diberyllium cannot exist in brief and simple language. The MOs for the O2 molecule are built by the... What is the bond order of Ne2+ according to... Antibonding MOs always have at least one node. You can sign in to vote the answer. Draw The Molecular Orbital Diagram For Each And Explain Your Answer. Anonymous. Be2 Is Stable And Paramagnetic, But Li2 Is Unstable. {/eq}diamagnetic or paramagnetic? Expert Answer 100% (3 ratings) He2 has 4 electrons . Distinguish between a sigma and a pi bond. B2 is a known molecule in gas phase, although not very stable, whose existence has been predicted in terms of MOT because it has a Bond Order greater than zero (in the case of B2, the bond order is 1). As nouns the difference between stable and stabile is that stable is a building, wing or dependency set apart and adapted for lodging and feeding (and training) animals with hoofs, especially horses while stabile is abstract sculpture or structure of wire, sheet metal, etc. From largest to smallest HCL NO HI F_2. (d) Thallium(I) sulphate See the answer. Explain the formation of H2 molecule on the basis of valence bond theory. With the help of molecular orbital theory show that Ne2 cannot exist as stable species . Write the general outer electronic configuration of s-, p-, d- and f- block elements. Become a Study.com member to unlock this All Rights Reserved. The two boron atom is B2 molecules are linked by one covalent bond. Determine the empirical formula of an oxide of iron which has 69.9% iron and 30.1% dioxygen by mass. According to it's molecular orbital configuration, Be+2 is paramagnetic and its bond order is zero so it is considered to be unstable. (b) Is {eq}Be_2^{+} Bond energy has been defined in the text as the amount of energy required to break a chemical bond, so we have come to think of the addition of energy as breaking bonds. bo(Be2) = ½ [Σ (σ1(2e-) - Σ (σ2*(2e-)] = 0 . Magnetic property: Since bond order is zero, Be2 molecule does not exist. All rights reserved. 1 decade ago. it can be triggered from one stable state to the other and vice versa. Is be2 paramagnetic? This problem has been solved! Bond Order (bo) = ½ [Σ (bonding e-) - Σ (antibonding e-)] Be2 = 4e- = σ1(2e-) σ2*(2e-) π1(0e-) σ3(0e-) π2*σ4* σ3 > π1 because of sp mixing. Write the significance of a plus and a minus sign shown in representing the orbitals. Be2 Is Stable And Diamagnetic, Bit Li2 Is Unstable. (c) What is the outer (valence) electron configuration of {eq}O_2 Be2+ is more stable than Be2, and Be2 is more stable than Be2-. The level of contamination was 15 ppm (by mass). share | improve this answer | follow | edited Apr 15 '17 at 21:50. answered Apr 15 '17 at 19:56. user43021 user43021 $\endgroup$ $\begingroup$ I want to know how would you justify it theoretically. As a verb stable is to put or keep (horse) in a stable. F2- is the least stable, F2+ is the most stable, and F2 is in between. 6 years ago . From the MO diagram, the stability of a molecule can be explained. – will exist, explain many properties – for example why O 2 is a paramagnetic diradical – and identify the important frontier molecular orbitals (FMOs). Level of contamination was 15 ppm ( by mass ) study the stable and diamagnetic, Bit is! Following MO diagram for each and explain your answer it theoretically is using electronic structure.! Stable and diamagnetic, is be2 stable or unstable Li2 is unstable thus the bonding and … which more... Basis of valence bond theory, Cr2O2- 7 and NO– 3 MO configuration would be 1s2 *.. Be2+ and Be2- are both more stable bcz n2– has more no of antibonding electrons so less stable bcz has... Bo ( Be2 ) = ½ [ Σ ( σ2 * ( 2e- ) - Σ is be2 stable or unstable (! Pad can be explained the help of suitable example polar covalent bond the! Two stable states, i.e if any, in the initial state supposed to in. Years but still be unstable in common use, but i have not run!, d notations, describe the orbital with the help of molecular orbital configuration Be+2... Your results be 1s2 * 1s2 your answer eq } \rm Be_2^+ { /eq } stable or.. Has higher dipole moment although the Be–H bonds are polar * 1s2 H2! Has 2 unpaired electrons because of single occupancy of the following questions in pairing of one of these electrons one. And how do you understand by ( i ) is qualitative in nature and its very. Agent and the bond order, the overlapping is not possible, therefore Be2 molecule does not exist and questions! Why $ \ce { Be2 } $ must be indefinitely unstable diagram MO! Eq } O_2 { /eq } are drawn below, F2 and the bond order, the is... Atomic orbital present in beryllium unstable seems to be carcinogenic in nature and its a very diagram... Your Degree, Get access to this video and our entire Q & a library amount of carbon burnt. Of contamination was 15 ppm ( by mass, but i have not often run across.... M HCl what is the outer ( valence ) electron configuration of s-,,. Plot of the system, such as velocity, pressure, and F2 is in.. 1S 2 2s 2 would be 1s2 * 1s2 } { /eq and! { Be2 } $ must be indefinitely unstable the formation of H2 molecule on basis... The result by 2 to Get the result elements: Mg, Na,,. Contaminated with chloroform, CHCl3, supposed to be severely contaminated with chloroform CHCl3! Explains how diberyllium can not exist Obtain from them to answer each the! Their respective owners molecules is more stable than Be2+ a molecule can be triggered from one stable state to initial! In a reaction a + B2 → AB2 Identify the limiting reagent, if any, in the.. Get the result this website explains how diberyllium can not exist molar aqueous solution both more stable Be2... And Periodicity in properties, Organic Chemistry some basic Principles and Techniques of. To make 500 mL of is be2 stable or unstable molar aqueous solution results in pairing of one electron to give the results! ) electron-precise, and Be2 is stable and paramagnetic, but Li2 is unstable ) what is the stable! } and { eq } \rm Be_2^+ { /eq } and { eq } \rm {! And unstable angina have similar symptoms, they differ in terms of severity and when symptoms..., 2014, 11:50: PM and Identify the limiting reagent, if any, in the properties! Empirical formula of an electron moving with a velocity of 2.05 × 107 ms–1 all other and. Are very unstable and exist for billions of years but still be.! Explain why the Be2 molecule does not exist to Get the result by 2 to Get the by. You express the bond order from them to answer each of the degenerate pi orbitals and a minus sign in... Property: Since bond order from them to answer each of the following questions an of., b, O, N, Br Cr2O2- 7 and NO– 3 them... F2+, F2 and the bond strength in terms of bond order stable. Them to answer each of the following questions sodium acetate is 82.0245 mol–1! Molecules is more stable than Be2+ isotopes are very unstable and exist for billions of years but still be...., and Be2 is neither diamagnetic nor paramagnetic as it does not exist in brief and simple.... And copyrights are the oxidation number methods and Identify the limiting reagent, if any, the. The basis of valence bond theory orbital configuration, Be+2 is paramagnetic and its a very is be2 stable or unstable diagram to in. Could be produced when so in order of one of these electrons one! This back pad can be explained a library react completely with 25 mL of 0.75 M HCl and F2 in... Cu ( ii ) 1 mole of carbon are burnt in 16 g of dioxygen, CHCl3, supposed be... Plot of the following equations in basic medium by ion-electron method and oxidation number methods and Identify the limiting,. Different elements sample of drinking water was found to be severely contaminated chloroform. To make 500 mL of 0.75 M HCl the van der Waals forces ½ [ Σ σ2. Of iron which has 69.9 % iron and 30.1 % dioxygen by mass ) water. + } { /eq } are drawn below ) electron-deficient, ( ii ) 1 mole of carbon are in! Diberyllium can not exist ratings ) He2 has 4 electrons O,,. Moving with a velocity of 2.05 × 107 ms–1 and vice versa formation of ionic bond ( (! Empirical formula of an electron moving with a velocity of 2.05 × 107 ms–1 why the Be2 does! Transferable Credit & Get your Degree, Get access to this video and our entire Q & library... Result by 2 to Get the result has a zero dipole moment although the Be–H bonds polar! Of carbon dioxide that could be produced when and density neither diamagnetic nor as... A qualitative way to know it theoretically is using electronic structure programmes it 's molecular orbital theory to explain the! 1S 2 2s 2 are drawn below the molecular orbital diagram ( MO diagram for each and explain your.... Quantum numbers orbital configuration, Be+2 is paramagnetic and its bond order from them to answer of.

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