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Worksheetschemical bonding
Total questions: 25
Worksheet time: 13mins
According to the octet rule, a calcium atom has a tendency to
gain one electron.
lose two electrons.
lose one electron.
gain two electrons.
If a compound forms by ionic bonding, which is not true?
A positively charged atom or group of atoms attracts a negatively charged atom or group of atoms.
Several ions group together in a tightly packed structure
The compound contains just two atoms, each of opposite charge.
The net charge of the compound is zero.
The only property listed that is not characteristic of ionic compounds is
high melting point.
hardness.
lack of crystal structure.
brittleness
Which formula listed below represents a polyatomic ion?
Ca+
SO42-
Al2(CO3)3
Cl-
The crystal structure of an ionic compound depends on the
a. sizes of the cations and anions.
b. ratio of cations to anions.
c. masses of the cation and anion.
d. Both (a) and (b)
The melting points of ionic compounds are higher than the melting points of molecular compounds because
ionic substances tend to vaporize at room temperature.
ionic substances are brittle.
attractive forces between ions are greater than the attractive forces between molecules.
the numbers of positive and negative charges are equal in an ionic compound.
A covalent bond is formed when two atoms
gain and lose electrons.
gain electrons.
share one or more pairs of electrons with each other.
share an electron with each other.
Two atoms will likely form a polar covalent bond if the electronegativity difference is
1.2
0.1
2.7
3.9
In which of these compounds is the bond between the atoms not a nonpolar covalent bond?
N2
Cl2
NaCl
O2
Bonding in molecules or ions that cannot be represented adequately by a single Lewis structure is represented by
covalent bonding.
double bonding.
resonance structures.
overlapping orbitals.
As the electronegativity difference between bonded atoms decreases, the bond becomes more
ionic.
covalent.
metallic.
reactive
The boiling point of water H2O, is higher than the boiling point of hydrogen sulfide, H2S, Because water molecules are
less polar and form hydrogen bonds.
more covalent and form hydrogen bonds.
ionic and form hydrogen bonds.
more polar and form hydrogen bonds.
Even though the following molecules contain polar bonds, the only polar molecule is
CCl4
NH3
CO2
CH4
As atoms bond with each other, they
increase their potential energy, thus creating less stable arrangements of matter.
decrease their potential energy, thus creating less stable arrangements of matter.
increase their potential energy, thus creating more stable arrangements of matter.
decrease their potential energy, thus creating more stable
In Which of the following compounds has the central atom not formed sp3 hybrid orbitals?
CO2
NH3
CCl4
PCl3
Which type of hybrid orbitals do oxygen atoms form in water molecules?
sp4
sp3
sp2
sp
Which type of bonding is characterized by overlapping orbitals that allow outer electrons of atoms to move about freely throughout the entire lattice?
ionic
multiple
covalent
metallic
According to the VSEPR theory, what is the shape of a molecule of CS2?
tetrahedral
linear
trigonal-planar
bent
In a double covalent bond,
one atom has more than eight valence electrons
one atom loses a pair of electrons
two atoms share eight valence electrons
two atoms share two pairs of electrons
To draw a Lewis structure, it is NOT necessary to know:
The length of the bonds
The types of atoms in the molecule
The number of valence electrons for each atom
The number of atoms in the molecule
Which compound most likely has the greatest bond energy?
H2; H-H bond length 75 pm
HBr; H-Br bond length 141 pm
HF; H-F bond length 92 pm
CBr; C-Br bond length 194 pm
Bond energy is the energy
absorbed as a molecule forms
change as atoms get closer together
required to break a chemical bond and form separate, neutral atoms
of two covalently bonded atoms.
If oxygen with an electronegativity of 3.4 were to make a chemical bond with lithium, electronegativity of 1.0, what kind of bond would form?
Ionic
Non-polar covalent
Polar covalent
Non-polar ionic
What is the correct definition of an ionic bond?
a type of chemical bond between two anions
a type of chemical bond between two cations
a type of chemical bond formed between a cation and an anion
a type of chemical bond where electrons are shared equally between atoms
The charge on an ion is
always positive.
zero.
either positive or negative.
always negative.
