Which of the following is most likely to be a covalently bonded, polar compound? question 6 options: nacl nh 3 ccl 4 ch 4 which of the following compounds is a molecule? question 7 options: alcl 3 h 2 nacl mgbr 2

Question 6

NH₃

NaCl contains Na, a group 1 metal bonded to Cl, a group 17 halogen. The electronegativity difference between Na and Cl is so large that the two atoms become ions. NaCl would contain ionic bonds rather than covalent bonds.Both N and H are nonmetals and form covalent bonds. As a result, NH₃ is a covalently bonded compound. N-H bonds are polar. The shape of NH₃ molecules is asymmetric. Dipoles won't cancel out within the molecule. NH₃ is therefore polar.Molecules of CCl₄ and CH₄ are symmetrical. Dipoles within both molecules would cancel out. Their molecules will not be polar.Question 7

H₂

A compound can be a molecule, a giant covalent crystal, or an ionic crystal. The exact type of the compound depends the difference between electronegativities of its atoms.

A compound with two nonmetals elements (H, O, N, F, Cl, etc.) tend to be a molecule.A nonmetal element combine and a metal element tend to produce an ionic crystals.Group 14 metalloids (C and Si) tend to form giant covalent crystal.

All four compounds excepting for H₂ are ionic crystals.

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