Chem chapter 16 blackboard review

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Which of the following substances most likely has the lowest boiling point? Cl2 HF MgCl2 Cu

cl2

The chemical bond formed when two atoms share one or more pairs of electrons is a(n)

covalent bond

To indicate resonance, a _____ is placed between a molecule's resonance structures.

double headed arrow

The correct Lewis structure for a Group 18 atom has

four pairs of valence electrons.

If two covalently bonded atoms move farther than a distance of the bond length, the potential energy of the atoms

increases

Iodine monochloride, ICl, has a higher boiling point than bromine, Br2, partly because ICl is a(n)

ionic substance

According to VSEPR theory, a molecule with the molecular formula of A2 is

linear in shape. a dipole.

Which of the following compounds most likely has the least bond energy? Cl2; Cl-Cl bond length = 199 pm HCl; H-Cl bond length = 127 pm HF; H-F bond length = 92 pm I2; I-I bond length = 266 pm

HF; H-F bond length = 92 pm

Which of the following molecular formulas show the polar nature of the HBr molecule?

H^d+ Br^d-

The correct Lewis structure for a fluorine atom in a molecule of F2 shows three unshared pairs of electrons. an octet of valence electrons. one shared pair of electrons. All of the above

All of the above

A covalent bond forms when the attraction between two atoms is balanced by repulsion and the potential energy is

at a minimum

According to VSEPR theory, the molecular shape of CO2 is classified as

bent

According to VSEPR theory, the molecular shape of H2O is classified as

bent

According to VSEPR theory, which of the following shapes is possible for a molecule with the molecular formula of AB2?

bent or trigonal pyramidal

A nonpolar covalent bond is most likely to form between two elements that have a difference in electronegativity values of

0.0-0.4

A polar covalent bond is most likely to form between two elements that have a difference in electronegativity values of

0.4-1.8

Which of the following number of atoms can form a tetrahedral molecule?

5

To draw the Lewis structure of the polyatomic ion, clo3-you would have to _____ those in the structures of Cl, O, O, and O.

add one electron to

An ionic bond is most likely to form between two elements that have a difference in electronegativity values of

more than 1.8

The correct Lewis structure for a molecule of the compound C2H2 contains

three single bonds????????

The correct Lewis structure for the boron atom has

three single valence electrons.

ccording to VSEPR theory, which of the following shapes is possible for a molecule with the molecular formula of AB3?

trigonal pyramidal

The correct Lewis structure for the oxygen atom has

two pairs of valence electrons and two single valence electrons.

The electrons involved in the formation of a covalent bond are

valence electrons.


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