(i) Size of the ions: Smaller the size, greater will be the lattice energy. Lattice energy of an ionic compound depends upon following factors: (iii) Lattice energy or enthalpy: It is defined as the amount of energy required to separate 1 mole of ionic compound into separate oppositely charged ions. So, the formation of anion is very common in halogens. Consequently, the probability of formation of ionic bond increases.įor example. Greater the negative electron gain enthalpy, easier will be the formation of anion. (ii) Electron gain enthalpy (Electron affinities): It is defined as the energy released when an isolated gaseous atom takes up an electron to form anion. Therefore, we can conclude that lower the ionization enthalpy, greater the chances of ionic bond formation. That’s why the formation of positive ion for sodium is easier than that of magnesium. While in case of magnesium, it is 743 kJ/mole. Due to this reason alkali metals have more tendency to form an ionic bond.įor example, in formation of Na + ion I.E = 496 kJ/mole Hence, lesser the ionization enthalpy, easier will be the formation of a cation and have greater chance to form an ionic bond. (i) Ionization enthalpy: As we know that ionization enthalpy of any element is the amount of energy required to remove an electron from outermost shell of an isolated gaseous atom to convert it into cation. Factors Affecting the Formation of Ionic Bond.(ii) Formation of magnesium oxide from magnesium and oxygen.Įlectrovalency: Electrovalency is the number of electrons lost or gained during the formation of an ionic bond or electrovalent bond. Na + ion has the configuration of Ne while Cl – ion represents the configuration of Ar. The compounds which is formed by ionic or electrovalent bond is known as electrovalent compounds. We can say that it is the electrostatic force of attraction which holds the oppositely charged ions together. Generally, it is formed between metals and non-metals. Ionic or Electrovalent bond is formed by the complete transfer of electrons from one atom to another. Co-ordinate bond: When the electrons are contributed by one atom and shared by both, the bond is formed and it is known as dative bond or co-ordinate bond. In these bonds electrons are contributed by both. By sharing of electrons: The bond which is formed by the equal sharing of electrons between one or two atoms is called covalent bond. By the transfer of electrons: The chemical bond which formed by the complete transfer of one or more electrons from one atom to another is termed as electrovalent bond or ionic bond. The negative and positive ions are stabilized by electrostatic attraction Example, Both the negative and positive ions acquire the noble gas configuration. Formation of an anion and cation by the halogens and alkali metals are formed by gain of electron and loss of electron respectively. In the periodic table, the highly electronegative halogens and the highly electro-positive alkali metals are separated by noble gases. Facts Stated by Kossel in Relation to Chemical Bonding.It is the outermost shell electron which takes part in chemical combination. The force that holds different atoms in a molecule is called chemical bond.Ītoms of different elements take part in chemical combination in order to complete their octet or to attain the noble gas configuration. Lakhmir Singh Science Class 8 SolutionsĬhemical Bonding and Molecular Structure Class 11 Notes Chemistry Chapter 4.PS Verma and VK Agarwal Biology Class 9 Solutions.NCERT Solutions for Class 9 Foundation of IT.NCERT Solutions for Class 9 Social Science.NCERT Solutions for Class 10 Foundation of Information Technology.NCERT Solutions For Class 10 Hindi Kritika.NCERT Solutions For Class 10 Hindi Kshitiz.NCERT Solutions For Class 10 Hindi Sparsh.NCERT Solutions For Class 10 Hindi Sanchayan.NCERT Solutions for Class 10 Social Science.NCERT Solutions for Class 11 Indian Economic Development.NCERT Solutions for Class 11 Political Science.NCERT Solutions for Class 11 Psychology.NCERT Solutions for Class 11 Entrepreneurship.NCERT Solutions for Class 11 Accountancy.NCERT Solutions for Class 11 Business Studies.NCERT Solutions for Class 11 Computer Science (Python).NCERT Solutions for Class 12 Psychology.NCERT Solutions for Class 12 Political Science.NCERT Solutions for Class 12 Entrepreneurship.NCERT Solutions for Class 12 Macro Economics.NCERT Solutions for Class 12 Micro Economics.NCERT Solutions for Class 12 Accountancy.NCERT Solutions for Class 12 Business Studies.NCERT Solutions for Class 12 Computer Science (C++).NCERT Solutions for Class 12 Computer Science (Python).RD Sharma Class 11 Solutions Free PDF Download.
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