Which of the following bonds could be described as nonpolar? a. H-P b. Li-O c. H

Question

Which of the following bonds could be described as nonpolar? a. H-P b. Li-O c. H-Li d. C-O e. B-Cl A covalent bond results when _____ a. electrons are transferred from one atom to another atom. b. an atom has 8 valence electrons. c. atoms pool their electrons to form a "sea" of electrons. d. electrons are shared between a pair of atoms. e. atoms have outer electrons with the same principal quantum number. Which type of bonding involves the sharing of valence electrons by two atoms? a. intramolecular b. polar ionic c. ionic d. metallic e. covalent What l quantum numbers are possible when n = 3? a. 0, 1, 2 b. 0, plusminus 1, plusminus 2, plusminus 3 c. 1, 2, 3 d. 0, plusminus 1, plusminus 2 e. 1 and 2

Explanation / Answer

11. Non-polar bonds arise when electronegativity difference between two atoms is zero.

Electronegativity Difference between two atoms Nature of Bond

(a) H-P 2.1-2.1 =0 Non-polar

(b) Li-O 3.5-1.1 =2.4 Polar

(c) H-Li 2.1-1.1 = 1 Polar

(d) C-O 3.5-2.5 = 1 Polar

(e) B-Cl 3 - 2 =1 Polar

So only non-polar bond H-P.

Option (a) is correct.

12.Covalent bonds form when pairs of electrons are shared by atoms.

So option (d) is correct.

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