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WorksheetsAtoms, Bonding, and the periodic table Chapter 3
Total questions: 30
Worksheet time: 17mins
What is a double bond?
A bond between two atoms.
One pair of electrons shared between two atoms
Two pairs of electrons shared between two atoms
Two pairs of electrons shared between four atoms
A metal crystal consists of positively charged metal ions embedded in a "sea" of freely moving (a) .
Which of the following terms means that metals can be rolled into thin sheets, as in aluminum foil, or beaten into complex shapes?
polar
ductile
alloy
malleable
A low melting point is one property of molecular compounds.
True
False, ionic
False, metallic
False, all
When an atom loses an electron, it becomes a
positive ion
negative ion
neutral ion
positive atom
Ionic compounds that dissolve in water conduct electricity because they break into (a) that move freely.
What is the group number of the group containing the most reactive nonmetals.
(a)
Which is a property shared by most molecular compounds?
high boiling point
low melting point
high melting point
nonpolar bonds
What kind of bond forms between sodium and chlorine in sodium chloride (NaCl)?
metallic bond
covalent bond
molecular bond
ionic bond
The properties of solid metals can be explained by the structure of and the bonding among the metal atoms.
True
False, ionic properties
False, luster
False, alloy
A mixture made of two or more elements, at least one of which is a metal is called a(n)
superconductor
alloy
complex metal
metallic bond
How many atoms of a Group 17 element would be needed to react with one atom of a Group 2 element?
(a)
Electrons involved in bonding between atoms are
valence electrons
inside the nucleus
closest to the nucleus
positively charged
Molecular compounds that dissolve in water do not conduct electricity because no (a) are present.
A nonpolar bond is formed when two atoms share electrons unequally.
True.
False, covalent
False, polar
False, ionic
Magnesium bromide is an ionic compound with the chemical formula MgBr2. What does the “2” tell you?
Bromide has a 2- charge.
There are two magnesium ions to every bromide ion.
There are two bromide ions for every magnesium ion.
Bromide has a 2+ charge.
Why metals are such good conductors of heat and electricity?
Positively charged metal ions are embedded in a "sea" of freely moving valence electrons.
Electricity can flow when charged particles are free to move.
Heat can flow from warmer areas to cooler areas because the electrons can move freely.
All of the above.
In an electron dot diagram of aluminum (Al), how many dots should be drawn around the element’s symbol?
13
3
26.982
Al
The chemical name for the compound with the formula Na2S is
sodium fluoride.
magnesium sulfide.
lithium oxide.
sodium sulfide.
When electrons are transferred between two atoms, a covalent bond is formed.
True
False, given
False, shared
False, ionic
Compare a covalent bond and an ionic bond.
Covalent bonds share electrons unequally while ionic bonds share equally.
They are both bonds between metals.
Covalent bonds have charged particles while ionic bonds share electrons.
Covalent bonds share electrons while ionic bonds have electrons that are transferred from one atom to another, creating charged particles.
In the chemical formula for an ionic compound, which item is written first?
the name of the positive ion
the name of the negative ion
the subscripts
the charges
Because the electrons in a molecule of hydrogen fluoride (HF) are more strongly pulled toward the fluorine atom, the molecule is (a) .
Orderly crystal shapes, high melting points, and electrical conductivity when dissolved in water are properties of ionic compounds.
True
False, metallic
False, covalent
False, molecular
Which of the following groups contains the most reactive elements?
the alkali metals
the alkaline earth metals
the carbon family
the noble gases
Solid metals are good conductors of heat and (a) .
How do valence electrons relate to the chemical reactions of an element?
Valence electrons are the electrons with the highest energy.
Valence electrons are located in the outermost shell of the atom.
The number of valence electrons determines how chemical reactions take place and what type of bond is formed.
All of them
What properties do ionic compounds have?
High melting point
Low melting point
High electrical conductivity
Low electrical conductivity
What properties do molecular compounds have?
High melting point
Low melting point
High electrical conductivity
Low electrical conductivity.
What properties do metallic bonds have?
Luster
High thermal conductivity
Low electrical conductivity
malleable
