(a) Briefly cite the main differences among the ionic, covalent and metallic bon
ID: 111653 • Letter: #
Question
(a) Briefly cite the main differences among the ionic, covalent and metallic bonding. (b) State the Pauli exclusion principle. Make a plot of bonding energy versus melting temperature for the metals listed in Table 2.3. Using this plot, approximate the bonding energy for molybdenum, which has a melting temperature of 261.7 degree C. Explain why hydrogen fluoride (HF) has a higher boiling temperature than hydrogen chloride (HCl) (19.4 degree vs -85 degree C), even though HF has a lower molecular weight. Compute the %IC of the interatomic bonds for each of the following compounds: Mgo, GaP, CsF, CdS, and FeO. (a) Calculate the %IC of the interatomic bonds for the intermetallic compound (b) On the basis of this result, what type of interatomic bonding would you expect to be found in What type(s) of bonding would be expected for each of the following materials solid xenon, calcium fluoride (CaF_2), bronze, rubber, and tungsten? Generate a spreadsheet that allows input values of A, B, and n (Equation 2.17) and then does the following: (a) Plots on a graph of potential energy versus interatomic separation for two for attractive (E_A), repulsive(E_R), and energies. (b) Determine the equilibrium spacing and the bonding energy Generate a spreadsheet that computes the %IC of a bond between atom of two elements once the user has input values for the elements Which of the following electron configuration is for an inert gas? What type(s) of bonding would be expected for brass(a copper-zinc alloy)? (A) Ionic bonding (B) Metallic bonding (C) Covalent bonding with some van der Waals bonding (D) van der Waals bonding What type(s) of bonding would be expected for rubber? (A) Ionic bonding (B) Metallic bonding (C) Covalent bonding with some van der Waals bonding (D) van der Waals bondingExplanation / Answer
2.22a)The main differences between the various forms of primary bonding are: Ionic--there is electrostatic attraction between oppositely charged ions. Covalent--there is electron sharing between two adjacent atoms such that each atom assumes a stable electron configuration. Metallic--the positively charged ion cores are shielded from one another, and also "glued" together by the sea of valence electrons.
b)The Pauli exclusion principle states that each electron state can hold no more than two electrons, which must have opposite spins.
2.1FE)The correct answer is A. The 1s22s22p63s23p6electron configuration is that of an inert gasbecause of filled 3sand 3psubshells
2.2FE)The correct answer is B.For bronze, the bonding is metallic because it is a metal alloy
2.3FE)The correct answer is C.For rubber, the bonding is covalent with some van der Waalsbonding. (Rubber is composed primarily of carbon and hydrogen atoms.
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