Chem chapter 16 blackboard review
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.
