Chemistry Exam
A nonmetal which has a metallic luster is iodine.
false
All nonmetals are very reactive.
false
All the elements in Group 3A are non-metals.
false
Like nonmetals, metalloids are not brittle.
false
Some metals are gases at room temperature.
false
The properties of metals depend mainly on the number and arrangement of neutrons
false
There are fewer nonmetals than there are elements in any other class
false
True or False: A cannot be drawn into a wire, but A is a good conductor of heat and electricity. We can infer that A is a metal.
false
True or False: A is mostly in solid state at room temperature and is a good insulator of heat. We can infer that A is a metal.
false
True or False: A tends to gain electrons and is a good conductor of electricity, so A is a metal.
false
True or False: Elements in period 5 are all metals.
false
Barium, having two valence electrons, belongs to which group?
group 2
One metal-like property of silicon is its ____ while a nonmetal-like property of silicon is its ___
luster; brittleness
What element is in group 2 and period 3 of the periodic table?
magnesium
Metals can be made into sheets. This property of metals is called ____
malleability
Generally, A loses electrons when reacting with nonmetals and gains electrons when reacting with metals. A is a(n)
metalloid
____, a small group of elements that lie between metals and nonmetals on the periodic table.
metalloids
The elements that are on the left side of the periodic table are called ____
metals
___ are elements that can conduct electricity.
metals
___ usually have one to three electrons in their outer shell.
metals
Which of the following is true?
metals are used in electrical cables as they are malleable, ductile and good conductors of electricity
How many valence electrons do metalloids have?
3-6
____ is the most abundant metal in the earth's crust.
Aluminum
In the periodic table, horizontal rows are called groups
False
The periodic table has changed very little since it was originally developed by Mendeleev and Meyer.
False
All the elements in a family have the _____
Same number of valence electrons
Elements within the same group (column) of the periodic table show similar chemical properties.
True
What metalloid is used in glass to help prevent it from breaking or cracking when subjected to rapid changes in temperature?
boron
Nonmetals are generally good conductors of heat and electricity.
false
Some metalloids are liquids at room temperature.
false
Many nonmetals need to gain electrons(s) to fill their other energy level and become stable. These nonmetals are ___
reactive
Which of the following are properties of nonmetals?
relatively low boiling point poor conductors of heat dull and brittle
Which of the following is the longest period in the periodic table?
sixth period
According to the modern periodic law, elemental properties are the periodic function of the atomic numbers.
true
Nonmetals are used as an insulating material around wire cables since they do not conduct electricity.
true
Nonmetals have a wider variation in properties than do metals.
true
The metalloid class is the smallest class of elements
true
True or False: A is a semiconductor and can form ionic or covalent bonds. A is considered a metalloid.
true
True or False: A is glossy, and it's a good conductor of heat. A is most likely a metal.
true
True or False: A is malleable and can conduct heat and electricity. A is a metal.
true
True or False: Because silicon has properties that are neither distinctly metallic nor clearly nonmetallic, it is a metalloid.
true
True or False: Metalloids are semiconductors are often used in electronics because of this property.
true
True or False. There are 11 periods in the periodic table.
False
Antimony belongs to ______ of the periodic table
Group 5a
Examples of metals include
Sodium
The only nonmetal that is a liquid at room temperature is ____
bromine
Which of the following elements is not a metalloid?
carbon
The sixth period of the periodic table begins with ____
cesium
Bromine is sometimes used as a disinfectant in swimming pools instead of what other nonmetal?
chlorine
The element with atomic number 75 belongs to which block?
d
Properties of nonmetals include
dull appearance
Metalloids that can conduct ____ at higher temperatures are called semiconductors.
electricity
Nonmetals are defined as elements that generally cannot conduct ___ and are poor conductors of heat.
electricity
The chemical symbols for the elements having atomic numbers 60 and 61 are ____ and ____ respectively.
nd,pm
The elements in the boron family of the periodic table are known as:
none of the above
A is generally a poor conductor of heat and electricity and has a wide range of chemical properties. A also tends to gain electrons. A is
nonmetal
Metalloids are found on the boundary between metals and ____ on the periodic table and possess properties that are similar to both types of elements.
nonmetals
The fourth period starts with _____
potassium
Which particles in the nuclei of the atoms are used to arrange the elements?
protons
Which of the following represents a property of metals?
shiny
The metalloid that is used to make computer chips is ____
silicon
The individual members of each chemical family have:
similar electron configurations
What nonmetal is used in the process of vulcanization of rubber?
sulfur
Which of the following statements are TRUE about nonmetals?
they can exist as solids, liquids, or gases they have a wide variety of properties, most of which are the opposite of metals.
All metals are good conductors of heat and electricity.
true
Boron is regarded as a semi-metal.
true
In the periodic table, there are 7 rows and 18 columns
true
Like metals, metalloids may be able to conduct heat and electricity, but not as well as metals.
true
Metalloids fall between metals and nonmetals in the periodic table.
true
Metalloids with four valence electrons may act like either metals or nonmetals, depending on the other elements in the reaction.
true
Metals are the largest of the three classes of elements.
true
Metals can conduct electricity.
true
Most of the elements that make up the human body are nonmetals.
true
Nonmetals are located on the right side of the periodic table.
true
True or False: Metals tend to lose electrons and are good conductors of heat and electricity.
true
True or False: Nonmetals tend to gain electrons.
true
True or False: The periodic table elements located in groups 2, 3, and 4 are all metals.
true
lodine cannot conduct electricity.
true
there are seven periods in the periodic table
true
Which element of period 7 is the heaviest element that occurs naturally on the Earth?
uranium
