Physical Science Chapter 9
The formation of an ionic bond
-results in a release of energy -helps atoms achieve a noble gas electron arrangement -involves a transfer of one or more electrons
How many atoms of oxygen are in a molecule of Al2(CO3)3?
9
What is the correct name for the ionic compound, CaF2?
Calcium Fluoride
What type of chemical bond does the sharing of a pair of electrons form?
Covaent
An atom becomes a positive ion by gaining an electron.
FALSE
Ionic bonds occur between atoms from adjacent groups.
FALSE
The -ide ending in nitrogen dioxide tells you that this is an ionic compound.
FALSE
The subscript "2" in Mg(OH)2tells you that the charge of the hydroxide ion is (-2).
FALSE
Atoms from an element in group IIA are allowed to react with atoms from an element in group VIIA. What type of compound is likely to form?
Ionic
The "fictional" element M would hypothetically form a stable ionic compound MCl2. If M were allowed to react with bromine, the resulting compound would have the formula
MBr2
Which combination of elements results in the formation of a white crystalline solid that dissolves to form a solution that conducts electricity?
Metal and non-metal
A chemical bond that involves somewhat unequal sharing of electrons is called
Polar covalent
A covalent bond is a shared pair of electrons.
TRUE
Atoms gain or lose electrons in order to attain a valence orbital arrangement like that of a noble gas.
TRUE
Three hydroxide ions are needed to form a neutral ionic compound with an aluminum ion.
TRUE
When atoms of non-metallic elements react with one another, they tend to seek stability by
acquiring a noble gas electron arrangement
The smallest unit of an element that can exist alone or in combination with other elements is an
atom
Atoms that have eight valence electrons would tend to
be inert
You know that a chemical reaction is taking place if
chemical bonds are formed or broken
The comparative ability of atoms of an element to attract bonding electrons is called
electronegativity
The amount of energy released when wood is burned is
equal to the amount of solar energy absorbed during its formation
The energy released during the formation of an ionic bond is called
heat of formation
The electrostatic attraction between positive and negative ions is called an
ionic bond
In an ionic compound, the metal
is written first
The smallest particle of a compound or a gaseous element that can exist and still retain the characteristic properties of that substance is a
molecule
The formation of a positive ion
occurs when an electron is removed from an atom
What kind of bond has unequal sharing of bonding electrons?
polar covalent
The electrons that participate in chemical bonding are the
valence electrons
What determines the chemical properties of an atom?
valence electrons
