Desk Name Date Laboratory Instructor Molecular Geometries 11 Pre-lab of Covalent

Question

Desk Name Date Laboratory Instructor Molecular Geometries 11 Pre-lab of Covalent Molecules Questions Lewis Structures and the VSEPR Model Before beginning this experiment in the laboratory, you should be able to answer the following questions 1. Distinguish among ionic, covalent, and metallic bonding. of the following molecules possess polar covalent bonds: H2. N2 HCL, HCN, and CO? 3. Which of the molecules in question 2 have molecular dipole moments? What are the favored geometrical arrangements for AB, molecules for which the A atom has 2, 3,4,5, and 6 pairs of electrons in its valence shell? 4. How many equivalent orbitals are involved in each of the following sets of hybrid orbitals: s spsp'd, and sp's 5. 6. Define the term formal charge 7. Calculate the formal charges of all of the atoms in Co, co,, and Co, 141 Copyright © 2015 Pearson Education, Inc.

Explanation / Answer

Ionic bonding involves the complete transfer of electrons from one atom to the other. This type of bond is generally formed by electropositve element and electronegative element. e.g, NaCl, CaO

Covalent bonding is formed by sharing of electrons between two atoms e.g. HF, HCl

Metallic bonding involves the free movement of valence electrons throught out the crystal lattice. e.g. Na, Cu

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