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WorksheetsIonic and covalent bonds
Total questions: 20
Worksheet time: 16mins
Which statement describes the energy changes that occur as bonds are broken and formed during a chemical reaction?
Energy is absorbed when bonds are both broken and formed.
Energy is released when bonds are both broken and formed.
Energy is absorbed when bonds are broken, and energy is released when bonds are formed.
Energy is released when bonds are broken, and energy is absorbed when bonds are formed.
An atom of which element has the strongest attraction for electrons in a chemical bond?
chlorine
carbon
phosphorus
sulfur
Which bond is least polar?
As-Cl
Bi-Cl
P-Cl
N-Cl
An element with an electronegativity of 0.9 bonds with an element with an electronegativity of 3.1. Which phrase best describes the bond between these elements?
mostly ionic in character and formed between two nonmetals
mostly ionic in character and formed between a metal and a nonmetal
mostly covalent in character and formed between two nonmetal
mostly covalent in character and formed between a metal and a nonmetal
Two atoms with an electronegativity difference of 0.4 form a bond that is
ionic, because electrons are shared
ionic, because electrons are transferred
covalent, because electrons are shared
covalent, because electrons are transferred
What occurs when potassium reacts with chlorine to form potassium chloride?
Electrons are shared and the bonding is ionic.
Electrons are shared and the bonding is covalent.
Electrons are transferred and the bonding is ionic.
Electrons are transferred and the bonding is covalent.
Which compound has covalent bonds?
H2O
Li2O
Na2O
K2O
Which substance has nonpolar covalent bonds?
Cl2
SiO2
SO3
CCl4
Which element has metallic bonds at room temperature?
bromine
cesium
krypton
sulfur
Conductivity in a metal results from the metal atoms having
high electronegativity
high ionization energy
highly mobile protons in the nucleus
highly mobile electrons in the valence level
Which element consists of positive ions immersed in a "sea" of mobile electrons?
sulfur
nitrogen
calcium
chlorine
What occurs as two atoms of fluorine combine to become a molecule of fluorine?
A bond is formed as energy is absorbed
A bond is formed as energy is released.
A bond is broken as energy is absorbed
A bond is broken as energy is released.
The elements Li and F combine to form an ionic compound. The electron configurations in this compound are the same as the electron configurations of atoms in Group
1
14
17
18
Which pair of elements below will form a compound with the greatest ionic character?
Pb and F
Ca and O
Na and Cl
Cs and N
Which formulas represent one ionic compound and one covalent compound?
N2 and SO2
Cl2 and H2S
BaCl2 and N2O4
NaOH and BaSO4
In a nonpolar covalent bond, electrons are
shared equally by two atoms
shared unequally by two atoms
transferred from one atom to another
located in a mobile "sea" shared by many atoms
To break a chemical bond, energy must be
absorbed
destroyed
produced
released
Which type of bonds are formed when calcium atoms react with oxygen atoms?
polar covalent
nonpolar covalent
metallic
ionic
When a reaction occurs between atoms with ground state electron configurations 2-1 and 2-7, the predominant type of bond formed is
polar covalent
ionic
nonpolar covalent
metallic
When ionic bonds are formed, metallic atoms tend to
lose electrons and become negative ions
lose electrons and become positive ions
gain electrons and become negative ions
gain electrons and become positive ions
