Question 1

Each horizontal row of the periodic table includes elements with chemical characteristics that are, in general,

Accepted Answer

A)  identical. 
B)  similar. 
C)  different. 
D)  sometimes similar and sometimes different. 
A)  identical. 
B)  similar. 
C)  different. 
D)  sometimes similar and sometimes different.

Question 2

The missing number in the equation 2CaNO3)2 → 2CaO + [ ]NO2 + O2 is

Accepted Answer

A)  1. 
B)  2. 
C)  3. 
D)  4. 
A)  1. 
B)  2. 
C)  3. 
D)  4.

Question 3

The number of units of NaOH needed to react with 1 unit of H3PO4 to form Na3PO4 and H2O is

Accepted Answer

A)  1. 
B)  2. 
C)  3. 
D)  4. 
A)  1. 
B)  2. 
C)  3. 
D)  4.

Question 4

The nitrate ion has the formula NO3-. The formula of mercuryII) nitrate is

Accepted Answer

A)  HgNO3. 
B)  Hg2NO3. 
C)  HgNO3)2. 
D)  Hg2NO3)2. 
A)  HgNO3. 
B)  Hg2NO3. 
C)  HgNO3)2. 
D)  Hg2NO3)2.

Question 5

A compound whose name ends in -ate always contains

Accepted Answer

A)  hydrogen. 
B)  oxygen. 
C)  one or more hydroxide groups. 
D)  only two elements. 
A)  hydrogen. 
B)  oxygen. 
C)  one or more hydroxide groups. 
D)  only two elements.

Question 6

The charge on halogen ions is

Accepted Answer

A)  +1. 
B)  +2. 
C)  -1. 
D)  -2. 
A)  +1. 
B)  +2. 
C)  -1. 
D)  -2.

Question 7

The statement that the elements in a given compound are always combined in the same proportions by mass is known as

Accepted Answer

A)  the periodic law. 
B)  the law of definite proportions. 
C)  the law of conservation of mass. 
D)  Dalton's law. 
A)  the periodic law. 
B)  the law of definite proportions. 
C)  the law of conservation of mass. 
D)  Dalton's law.

Question 8

Each electron shell in an atom contains

Accepted Answer

A)  the same number of electrons as all its other shells. 
B)  electrons whose energies are exactly the same. 
C)  electrons with the same principal quantum number n. 
D)  electrons with the same probability clouds. 
A)  the same number of electrons as all its other shells. 
B)  electrons whose energies are exactly the same. 
C)  electrons with the same principal quantum number n. 
D)  electrons with the same probability clouds.

Question 9

At room temperature, bromine is a

Accepted Answer

A)  colorless gas. 
B)  greenish-yellow gas. 
C)  reddish-brown liquid. 
D)  steel-gray solid. 
A)  colorless gas. 
B)  greenish-yellow gas. 
C)  reddish-brown liquid. 
D)  steel-gray solid.

Question 10

The elements with the highest ionization energies are the

Accepted Answer

A)  alkali metals 
B)  halogens 
C)  inert gases 
D)  rare earths 
A)  alkali metals 
B)  halogens 
C)  inert gases 
D)  rare earths

Question 11

An element that can form an ionic compound with oxygen is

Accepted Answer

A)  carbon. 
B)  calcium. 
C)  nitrogen. 
D)  neon. 
A)  carbon. 
B)  calcium. 
C)  nitrogen. 
D)  neon.

Question 12

Known elements have atomic numbers up to

Accepted Answer

A)  92 
B)  100 
C)  118 
D)  150 
A)  92 
B)  100 
C)  118 
D)  150

Question 13

In a covalent compound

Accepted Answer

A)  electrons are shifted from one atom to another. 
B)  only atoms of the same element are present. 
C)  there must be at least one carbon atom. 
D)  adjacent atoms share electron pairs. 
A)  electrons are shifted from one atom to another. 
B)  only atoms of the same element are present. 
C)  there must be at least one carbon atom. 
D)  adjacent atoms share electron pairs.

Question 14

A horizontal row in the periodic table is called a

Accepted Answer

A)  shell. 
B)  subshell. 
C)  group. 
D)  period. 
A)  shell. 
B)  subshell. 
C)  group. 
D)  period.

Question 15

Of the halogens, at room temperature and atmospheric pressure

Accepted Answer

A)  all are gases. 
B)  one is a gas and the others are liquids. 
C)  one is a gas and the others are solids. 
D)  one is a liquid and the others are gases or solids. 
A)  all are gases. 
B)  one is a gas and the others are liquids. 
C)  one is a gas and the others are solids. 
D)  one is a liquid and the others are gases or solids.

Question 16

The ion of the hydroxide group has the symbol

Accepted Answer

A)  OH. 
B)  OH+. 
C)  OH-. 
D)  H2O-. 
A)  OH. 
B)  OH+. 
C)  OH-. 
D)  H2O-.

Question 17

The most active of the following metals is

Accepted Answer

A)  silver. 
B)  potassium. 
C)  zinc. 
D)  copper. 
A)  silver. 
B)  potassium. 
C)  zinc. 
D)  copper.

Question 18

An atom whose outer electron shell is filled is

Accepted Answer

A)  a halogen. 
B)  an active metal. 
C)  an inactive metal. 
D)  an inert gas. 
A)  a halogen. 
B)  an active metal. 
C)  an inactive metal. 
D)  an inert gas.

Question 19

The metals most difficult to extract from their ores in general

Accepted Answer

A)  are the least active chemically. 
B)  are the most active chemically. 
C)  have the lowest atomic numbers. 
D)  have the highest atomic numbers. 
A)  are the least active chemically. 
B)  are the most active chemically. 
C)  have the lowest atomic numbers. 
D)  have the highest atomic numbers.

Question 20

The electrolysis of water is an example of a

Accepted Answer

A)  combination reaction. 
B)  decomposition reaction. 
C)  single displacement reaction. 
D)  double displacement reaction. 
A)  combination reaction. 
B)  decomposition reaction. 
C)  single displacement reaction. 
D)  double displacement reaction.

Each horizontal row of the periodic table includes elements with chemical characteristics that are, in general,

The missing number in the equation 2CaNO₃)₂ → 2CaO + [ ]NO₂ + O₂ is

The number of units of NaOH needed to react with 1 unit of H₃PO₄ to form Na₃PO₄ and H₂O is

The nitrate ion has the formula NO₃^-. The formula of mercuryII) nitrate is

A compound whose name ends in -ate always contains

The charge on halogen ions is

The statement that the elements in a given compound are always combined in the same proportions by mass is known as

Each electron shell in an atom contains

At room temperature, bromine is a

The elements with the highest ionization energies are the

An element that can form an ionic compound with oxygen is

Known elements have atomic numbers up to

In a covalent compound

A horizontal row in the periodic table is called a

Of the halogens, at room temperature and atmospheric pressure

The ion of the hydroxide group has the symbol

The most active of the following metals is

An atom whose outer electron shell is filled is

The metals most difficult to extract from their ores in general

The electrolysis of water is an example of a

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Exam 10: The Periodic Law

Each horizontal row of the periodic table includes elements with chemical characteristics that are, in general,

The missing number in the equation 2CaNO3)2 → 2CaO + [ ]NO2 + O2 is

The number of units of NaOH needed to react with 1 unit of H3PO4 to form Na3PO4 and H2O is

The nitrate ion has the formula NO3-. The formula of mercuryII) nitrate is

A compound whose name ends in -ate always contains

The charge on halogen ions is

The statement that the elements in a given compound are always combined in the same proportions by mass is known as

Each electron shell in an atom contains

At room temperature, bromine is a

The elements with the highest ionization energies are the

An element that can form an ionic compound with oxygen is

Known elements have atomic numbers up to

In a covalent compound

A horizontal row in the periodic table is called a

Of the halogens, at room temperature and atmospheric pressure

The ion of the hydroxide group has the symbol

The most active of the following metals is

An atom whose outer electron shell is filled is

The metals most difficult to extract from their ores in general

The electrolysis of water is an example of a

The Scientific Method

Motion

Energy

Energy and the Future

Matter and Heat

Electricity and Magnetism

Waves

The Nucleus

The Atom

Crystals, Ions, and Solutions

Chemical Reactions

Organic Chemistry

Atmosphere and Hydrosphere

The Rock Cycle

The Evolving Earth

The Solar System

The Stars

The Universe Galaxies

Filters

The missing number in the equation 2CaNO₃)₂ → 2CaO + [ ]NO₂ + O₂ is

The number of units of NaOH needed to react with 1 unit of H₃PO₄ to form Na₃PO₄ and H₂O is

The nitrate ion has the formula NO₃^-. The formula of mercuryII) nitrate is