WorksheetsPhysical Science Chapter 5B Test Review
Total questions: 23
Worksheet time: 1hrs 9mins
At room temperature most covalent compounds are
crystal
liquids or gases
liquids
solid
A covalent bond is called __________ if the atoms equally share one or more pairs of electrons.
nonpolar
double
triple
polar
In a double bond, ________ electrons are shared
2
4
6
8
A molecule in which polar covalent bonds do not cancel out will be
metallic
ionic
nonpolar
polar
A neutral group of atoms joined by covalent bonds is a(n)
crystal
element
molecule
ion
Molecular (covalent) compounds are good conductors of electricity when dissolved in water.
True
False
Atoms in a nonpolar covalent bond carry slight electrical charges
True
False
When two atoms share two pairs of electrons, a triple bond is formed.
True
False
Water molecules are polar
True
False
Electrons are shared equally in a nonpolar covalent bond.
True
False
Why don't water and oil mix?
What are the four characteristics covalent compounds share?
An attraction between a positive metal ion and the electrons surrounding it is a
covalent bond
metallic bond
nonpolar bond
triple bond
Which of the following is NOT a characteristic that results from metallic bonding?
hard, brittle crystals
electrical conductivity
ability to change shape
luster
A mixture of elements that have the properties of a metal is a(n)
alloy
crystal
ion
heterogeneous mixture
Which of the following is NOT true about metals and metallic bonding?
atoms of most metals have one, two, or three valence electrons
Atoms of metals lose electrons easily
metal atoms usually gain valence electrons when they combine chemically
In chemical reactions, metal atoms usually become positively charged ions
The valence electrons of metal atoms that drift freely around the atoms in a sample of metal is a description of
a nonpolar bond
a polar bond
luster
the "sea of electrons"
Ductility refers to the ability of a metal to be bent easily and pulled into thin strands of wire
True
False
An alloy of gold is more useful for jewelry than pure gold
True
False
Alloys are more likely to react with air or water than are the pure metals from which they are made
True
False
Stainless steel is an alloy
True
False
Metals are not good conductors of heat and electricity
True
False
What are the four properties of metals?
