Predict the bond formed between each of the following pairs of atoms is ionic, nonpolar or polar covalent?

Question

a) S and O in SO3b) Si and Pc) Ca and Brd) O and O e) P and O in H3PO4

Everardo Feil · Accepted Answer

The key to solving this problem is to know the electronegativity values of the above atoms. If the difference between bonding atoms is under 1.2 they are considered to be covalent, above 1.8 they are ionic and between 1.2 – 1.8 they are polar covalent. Now the electronegativity values and differences dE: a) S = 2.58 and O = 3.44, dE = 0.86, it’s under 1.2 so the S—O bond is non polar. b) Si = 1.90 and P = 2.19 dE = 0.29 so Si—P is even more non polar than S—Oc) Ca = 1.00 and Br = 2.96 dE = 1.96, it’s over 1.8 so Ca—Br is ionic as indeed one would expect when any metal such as Ca combines with a non metal such as Br d) O and O are the same so the electronegativity difference is 0.00, O—O it’s a totally non polar bond. e) P = 2.19 and O = 3.44 dE = 1.25 so the P—O bond is just about polar covalentFind electronegativity values at: http://mychemist.files.wordpress.com/2008/07/pauli…

Everardo Feil · Answer

Na and O form an ionic bond. They do so to satiafy their octets. They form Na 2 O, Na2O2, NaO2(superoxide). O & O form non polar covalent bond because of abscence in electronegativity diff. P&O form polar covalent bond.

Everardo Feil · Answer

1 non polar2 non polar3 non polar4 polar5 polar

Oran Armstrong

Predict the bond formed between each of the following pairs of atoms is ionic, nonpolar or polar covalent?

3 Answers

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