Question 1

An aqueous solution of the colorless gas HCl is called ______________.

Accepted Answer

The answer of An aqueous solution of the colorless gas...

Question 2

Which of the following is not one of the five major divisions of chemistry?

Accepted Answer

A)  Nuclear chemistry 
B)  Physical chemistry 
C)  Biochemistry 
D)  Inorganic chemistry 
A)  Nuclear chemistry 
B)  Physical chemistry 
C)  Biochemistry 
D)  Inorganic chemistry

Question 3

About 99% by mass of Earth's atmosphere is composed of the two elements

Accepted Answer

A)  nitrogen and oxygen. 
B)  oxygen and carbon dioxide. 
C)  oxygen and silicon. 
D)  hydrogen and helium. 
A)  nitrogen and oxygen. 
B)  oxygen and carbon dioxide. 
C)  oxygen and silicon. 
D)  hydrogen and helium.

Question 4

The molecular formula of "buckyball" is ______________.

Accepted Answer

The answer of The molecular formula of "buckyball" is ______________....

Question 5

The most abundant element in the universe is

Accepted Answer

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

Question 6

The element ______________ is a soft,active metal and forms a compound called lye.

Accepted Answer

The answer of The element ______________ is a soft,active metal...

Question 7

Take a cup of water,add sugar,and stir.Continue adding sugar and stirring until the sugar crystals no longer dissolve.Then apply heat to dissolve the remaining crystals.If the resulting solution is allowed to slowly cool,the solution is said to be

Accepted Answer

A)  an unsaturated solution. 
B)  a saturated solution. 
C)  a supersaturated solution. 
D)  none of these. 
A)  an unsaturated solution. 
B)  a saturated solution. 
C)  a supersaturated solution. 
D)  none of these.

Question 8

H3PO4 is the formula for ______________acid.

Accepted Answer

Question 9

Which of the following is the symbol for an alkali metal?

Accepted Answer

A)  Al 
B)  Cl 
C)  K 
D)  Ca 
A)  Al 
B)  Cl 
C)  K 
D)  Ca

Question 10

A nonchemical combination of two or more substances in variable proportions is called

Accepted Answer

A)  a mixture. 
B)  a compound. 
C)  an ion. 
D)  a molecule. 
A)  a mixture. 
B)  a compound. 
C)  an ion. 
D)  a molecule.

Question 11

Which of the following Group 1A elements has the smallest atom?

Accepted Answer

A)  Rb 
B)  Na 
C)  K 
D)  Li 
A)  Rb 
B)  Na 
C)  K 
D)  Li

Question 12

How many valence electrons do the Group 6A elements have?

Accepted Answer

A)  7 
B)  zero 
C)  6 
D)  1 
A)  7 
B)  zero 
C)  6 
D)  1

Question 13

About 15% by mass of Earth's core is composed of the element(s)

Accepted Answer

A)  iron 
B)  nickel 
C)  oxygen. 
D)  silicon. 
E)  iron and nickel. 
A)  iron 
B)  nickel 
C)  oxygen. 
D)  silicon. 
E)  iron and nickel.

Question 14

The formula for sulfuric acid is _________________.

Accepted Answer

The answer of The formula for sulfuric acid is _________________....

Question 15

If all samples of a material have identical properties and composition,it is

Accepted Answer

A)  a compound. 
B)  an element. 
C)  a homogeneous mixture. 
D)  an element or compound. 
A)  a compound. 
B)  an element. 
C)  a homogeneous mixture. 
D)  an element or compound.

Question 16

Arrange the atoms magnesium,fluorine,strontium,and sulfur in order of increasing ionization energy.

Accepted Answer

strontium,

Question 17

Arrange the atoms calcium,barium,chlorine,and bromine in order of increasing atomic radius.

Accepted Answer

chlorine,b

Question 18

Which of the following elements has the lowest ionization energy?

Accepted Answer

A)  Ar 
B)  Na 
C)  Ne 
D)  Li 
A)  Ar 
B)  Na 
C)  Ne 
D)  Li

Question 19

In 1661,who developed a definition of element that made the concept subject to laboratory investigation?

Accepted Answer

A)  Berzelius 
B)  Boyle 
C)  Lavoisier 
D)  Davy 
A)  Berzelius 
B)  Boyle 
C)  Lavoisier 
D)  Davy

Question 20

In 1869,a major event in the history of chemistry occurred; it was the

Accepted Answer

A)  discovery of the law of definite proportions. 
B)  discovery of the octet rule. 
C)  discovery of the law of conservation of mass. 
D)  development of the periodic table. 
A)  discovery of the law of definite proportions. 
B)  discovery of the octet rule. 
C)  discovery of the law of conservation of mass. 
D)  development of the periodic table.

Exam 11: The Chemical Elements

An aqueous solution of the colorless gas HCl is called ______________.

Which of the following is not one of the five major divisions of chemistry?

About 99% by mass of Earth's atmosphere is composed of the two elements

The molecular formula of "buckyball" is ______________.

The most abundant element in the universe is

The element ______________ is a soft,active metal and forms a compound called lye.

Take a cup of water,add sugar,and stir.Continue adding sugar and stirring until the sugar crystals no longer dissolve.Then apply heat to dissolve the remaining crystals.If the resulting solution is allowed to slowly cool,the solution is said to be

H3PO4 is the formula for ______________acid.

Which of the following is the symbol for an alkali metal?

A nonchemical combination of two or more substances in variable proportions is called

Which of the following Group 1A elements has the smallest atom?

How many valence electrons do the Group 6A elements have?

About 15% by mass of Earth's core is composed of the element(s)

The formula for sulfuric acid is _________________.

If all samples of a material have identical properties and composition,it is

Arrange the atoms magnesium,fluorine,strontium,and sulfur in order of increasing ionization energy.

Arrange the atoms calcium,barium,chlorine,and bromine in order of increasing atomic radius.

Which of the following elements has the lowest ionization energy?

In 1661,who developed a definition of element that made the concept subject to laboratory investigation?

In 1869,a major event in the history of chemistry occurred; it was the

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H₃PO₄ is the formula for ______________acid.