Ch 4 Compounds & their bonds

Flashcard maker : Lily Taylor
The octet rule indicates that
atoms lose, gain, or share valence electrons to have 8 valence electrons.
In ionic compounds ________ lose their valence electrons to form positively charged ________.
metals, cations
How many electrons will aluminum gain or lose when it forms an ion?
lose 3
What is the symbol for the ion with 19 protons and 18 electrons?
K+
To form an ion a sodium atom
loses one electron.
An anion always
has a negative charge.
What is the ionic charge of an ion with 18 protons and 15 electrons?
3+
The number of electrons in an ion with 20 protons and an ionic charge of 2- is
22.
Elements in group 2A(2) of the periodic table form ions with a charge of
2+.
The ion of aluminum is
Al3+
How many electrons will chlorine gain or lose when it forms an ion?
gain 1
An ionic compound has a net charge of
zero.
The correct formula for a compound formed from the elements Al and O is
Al2O3
The correct formula for the compound formed from Mg and S is
MgS.
Which one of the following compounds contains an ion with a 3+ charge?
FeCl3
What is the correct formula for the oxide ion?
O2-
The compound is named
magnesium chloride.
Which one of the following elements forms two or more ions with different ionic charges?
Fe
What is the correct formula for the iron (II) ion?
Fe2+
The name of the ion is
copper (I).
What is the correct formula for iron (III) sulfide?
Fe2S3
A(n) ________ is the smallest neutral unit of two or more atoms held together by a covalent bond.
molecule
In a molecule with covalent bonding
atoms are held together by sharing electrons.
Which of the following elements does NOT exist as a diatomic molecule?
carbon
In a covalently bonded molecule the number of electrons that an atom shares with others is usually equal to the number of electrons
needed to give it a noble gas arrangement.
Double and triple bonds form because
single covalent bonds do not give all of the atoms in the molecule eight valence electrons.
The correct name of the compound is
nitrogen trichloride.
According to naming rules the types of compound that use prefixes in their names are
covalent compounds.
The correct name for the compound is
dinitrogen trioxide.
What is the formula of carbon tetraiodide?
CI4
The name of Al2(SO4)3 is?
aluminum sulfate.
The ability of an atom to attract the shared electrons in a covalent bond is its
electronegativity.
Which of the following substances contains a nonpolar covalent bond?
N2
Which of the following compounds contains a polar covalent bond?
HCl
Which of the following compounds contains an ionic bond?
CaO
Ionic bonding is expected in which of these compounds?
KF
A polar covalent bond is found in which of these compounds?
H2O
The bond in Cl2 is a(n)
nonpolar covalent bond.
A group of covalently bonded atoms that has an overall electrical charge is called a(n)
polyatomic ion.
Which of the following polyatomic ions has a positive charge?
ammonium
Which of the following polyatomic ions has a 3- ionic charge?
phosphate
What is the formula of the nitride ion?
N3-
The name of the ion is
hydrogen sulfate.
What is the formula of a compound that contains Na+ and PO43- ions?
Na3PO4
Fe2 (SO4)3 is called
iron (III) sulfate.
What is the formula for aluminum nitrate?
Al(NO3)3
The VSEPR theory allows us to determine the
shape of a molecule.
When a cation is formed from a representative element
electrons are lost and the ion is smaller
The shape of the ammonia molecule (NH3) is
pyramidal.
The shape of the water molecule (H2O) is
bent
The main type of interaction between molecules of ammonia (NH3) are
hydrogen bonds.
The main type of interaction between molecules of hydrogen (H2) are
dispersion forces.
The carbon tetrachloride molecule has the shape of a
tetrahedron.
The carbon tetrachloride molecule is
a nonpolar molecule with polar bonds.
The ammonia molecule (NH3) is
a polar molecule with polar bonds.
Is carbon tetrachloride covalent or ionic?
covalent
Is potassium oxide covalent or ionic?
ionic
Is carbon dioxide covalent or ionic?
covalent
Is dihydrogen sulfide covalent or ionic?
covalent
Is sodium fluoride covalent or ionic?
ionic
Is nitrogen trichloride covalent or ionic?
covalent

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