Chapter 8
Of the atoms below, __________ is the least electronegative
Cs
The only noble gas without eight valence electrons is
He
Based on the octet rule, phosphorus most likely forms a __________ ion.
P^3-
Of the atoms below, __________ is the most electronegative
Br
Which of the following would have to lose two electrons in order to achieve a noble gas electron configuration
Sr
As the number of covalent bonds between two atoms increases, the distance between the atoms __________ and the strength of the bond between them _
decreases, increases
For a given arrangement of ions, the lattice energy increases as ionic radius __________ and as ionic charge __________.
decreases, increases
The ability of an atom in a molecule to attract electrons is best quantified by the
electronegativity
Electronegativity __________ from left to right within a period and __________ from top to bottom within a group.
increases, decreases
Elements from opposite sides of the periodic table tend to form
ionic compounds
The type of compound that is most likely to contain a covalent bond is
one that is composed of only nonmetals
To convert from one resonance structure to another,
only electrons can be moved
Resonance structures differ by
placement of electrons only
A __________ covalent bond between the same two atoms is the longest.
single
For resonance forms of a molecule or ion,
the observed structure is an average of the resonance forms
A double bond consists of __________ pairs of electrons shared between two atoms
2
What is the maximum number of double bonds that a carbon atom can form?
2
There are __________ paired and __________ unpaired electrons in the Lewis symbol for a phosphorus atom.
2,3
The ion ICI4- has __________ valence electrons
36
The principal quantum number of the electrons that are lost when tungsten forms a cation is
6
The halogens, alkali metals, and alkaline earth metals have __________ valence electrons, respectively
7, 1,and 2
Based on the octet rule, magnesium most likely forms a __________ ion
.Mg2+
Of the possible bonds between carbon atoms (single, double, and triple)
.a double bond is longer than a triple bond
Lattice energy is
.the energy required to convert a mole of ionic solid into its constituent ions in the gas phase
How many unpaired electrons are there in the Lewis structures of a N^3- ion?
0
What is the maximum number of double bonds that a hydrogen atom can form?
0
The Lewis structure of PF3 shows that the central phosphorus atom has __________ nonbonding and __________ bonding electron pairs
1,3
The Lewis structure of HCN (H bonded to C) shows that __________ has __________ nonbonding electron pairs
N, 1
Given the electronegativities below, which covalent single bond is most polar?
O-H
