Question 1

The largest number of elements are classed as

Accepted Answer

A) metals. 
B) inert gases. 
C) nonmetals. 
D) liquids. 
A) metals. 
B) inert gases. 
C) nonmetals. 
D) liquids.

Question 2

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 3

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 4

When a molecule breaks up into its constituent atoms,

Accepted Answer

A) energy is absorbed. 
B) energy is given off. 
C) there is no energy change. 
D) any of these choices could be correct, depending on the molecule. 
A) energy is absorbed. 
B) energy is given off. 
C) there is no energy change. 
D) any of these choices could be correct, depending on the molecule.

Question 5

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 6

A molecule that does not contain a polar covalent bond is

Accepted Answer

A) CO. 
B) BrF. 
C) HI. 
D) Cl2. 
A) CO. 
B) BrF. 
C) HI. 
D) Cl2.

Question 7

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 8

The most active of the following nonmetals is

Accepted Answer

A) helium. 
B) carbon. 
C) chlorine. 
D) oxygen. 
A) helium. 
B) carbon. 
C) chlorine. 
D) oxygen.

Question 9

A family of elements whose atoms react by picking up electrons is the

Accepted Answer

A) alkali metals. 
B) halogens. 
C) transition metals. 
D) inert gases. 
A) alkali metals. 
B) halogens. 
C) transition metals. 
D) inert gases.

Question 10

The most abundant element in the universe is

Accepted Answer

A) hydrogen. 
B) helium. 
C) oxygen. 
D) carbon. 
A) hydrogen. 
B) helium. 
C) oxygen. 
D) carbon.

Question 11

The chromate ion has the formula CrO42-.The formula of tin(I) chromate is

Accepted Answer

A) SnCrO4. 
B) Sn2CrO4. 
C) Sn(CrO4)2. 
D) Sn2(CrO4)2. 
A) SnCrO4. 
B) Sn2CrO4. 
C) Sn(CrO4)2. 
D) Sn2(CrO4)2.

Question 12

Chlorine forms Cl- ions.The compound FeCl3 is called

Accepted Answer

A) iron (I) chloride. 
B) iron (III) chloride. 
C) iron (I) chlorate. 
D) iron (III) chlorate. 
A) iron (I) chloride. 
B) iron (III) chloride. 
C) iron (I) chlorate. 
D) iron (III) chlorate.

Question 13

Which one of the following substances is a homogeneous mixture?

Accepted Answer

A) aluminum 
B) seawater 
C) salt 
D) wood 
A) aluminum 
B) seawater 
C) salt 
D) wood

The largest number of elements are classed as

A horizontal row in the periodic table is called a

Of the halogens, at room temperature and atmospheric pressure

When a molecule breaks up into its constituent atoms,

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

A molecule that does not contain a polar covalent bond is

An atom whose outer electron shell is filled is

The most active of the following nonmetals is

A family of elements whose atoms react by picking up electrons is the

The most abundant element in the universe is

The chromate ion has the formula CrO₄^2-.The formula of tin(I) chromate is

Chlorine forms Cl^- ions.The compound FeCl₃ is called

Which one of the following substances is a homogeneous mixture?

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

Universe

Filters

Exam 10: The Periodic Law

The largest number of elements are classed as

A horizontal row in the periodic table is called a

Of the halogens, at room temperature and atmospheric pressure

When a molecule breaks up into its constituent atoms,

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

A molecule that does not contain a polar covalent bond is

An atom whose outer electron shell is filled is

The most active of the following nonmetals is

A family of elements whose atoms react by picking up electrons is the

The most abundant element in the universe is

The chromate ion has the formula CrO42-.The formula of tin(I) chromate is

Chlorine forms Cl- ions.The compound FeCl3 is called

Which one of the following substances is a homogeneous mixture?

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

Universe

Filters

The chromate ion has the formula CrO₄^2-.The formula of tin(I) chromate is

Chlorine forms Cl^- ions.The compound FeCl₃ is called