Question 1

Atoms of two different elements

Accepted Answer

A)  may form no compounds together. 
B)  can form only one compound together. 
C)  can always form more than one compound together. 
D)  must form ions of the same charge if they are to form a compound together. 
A)  may form no compounds together. 
B)  can form only one compound together. 
C)  can always form more than one compound together. 
D)  must form ions of the same charge if they are to form a compound together.

Question 2

The number of oxygen atoms in a molecule of aluminum sulfate, Al2SO4)3, is

Accepted Answer

A)  3. 
B)  4. 
C)  7. 
D)  12. 
A)  3. 
B)  4. 
C)  7. 
D)  12.

Question 3

A bonding molecular orbital

Accepted Answer

A)  always consists of s atomic orbitals that overlap. 
B)  always consists of p atomic orbitals that overlap. 
C)  always consists of one s and one p atomic orbital that overlap. 
D)  may consist of any of the above overlaps. 
A)  always consists of s atomic orbitals that overlap. 
B)  always consists of p atomic orbitals that overlap. 
C)  always consists of one s and one p atomic orbital that overlap. 
D)  may consist of any of the above overlaps.

Question 4

The number of H2O molecules needed to react with 1 atom of Be to form H2 and BaOH)2 is

Accepted Answer

A)  1. 
B)  2. 
C)  4. 
D)  8. 
A)  1. 
B)  2. 
C)  4. 
D)  8.

Question 5

The least active of the following nonmetals is

Accepted Answer

A)  oxygen. 
B)  fluorine. 
C)  sulfur. 
D)  helium. 
A)  oxygen. 
B)  fluorine. 
C)  sulfur. 
D)  helium.

Question 6

Carbon

Accepted Answer

A)  is a typical metal. 
B)  is a typical nonmetal. 
C)  has properties intermediate between those of metals and nonmetals. 
D)  has properties no other element has. 
A)  is a typical metal. 
B)  is a typical nonmetal. 
C)  has properties intermediate between those of metals and nonmetals. 
D)  has properties no other element has.

Question 7

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 8

According to the periodic table, the chemical properties of the elements are periodic functions of their

Accepted Answer

A)  density. 
B)  atomic number. 
C)  atomic mass. 
D)  mass number. 
A)  density. 
B)  atomic number. 
C)  atomic mass. 
D)  mass number.

Question 9

When atoms join to form a molecule,

Accepted Answer

A)  energy is absorbed. 
B)  energy is given off. 
C)  energy is neither absorbed nor given off. 
D)  Any of these choices, depending on the circumstances. 
A)  energy is absorbed. 
B)  energy is given off. 
C)  energy is neither absorbed nor given off. 
D)  Any of these choices, depending on the circumstances.

Question 10

The atomic mass of an element is

Accepted Answer

A)  the average atomic mass of its isotopes according to their proportions in nature. 
B)  the average mass number of its isotopes according to their proportions in nature. 
C)  the average atomic number of its isotopes according to their proportions in nature. 
D)  the atomic mass of its most abundant isotope. 
A)  the average atomic mass of its isotopes according to their proportions in nature. 
B)  the average mass number of its isotopes according to their proportions in nature. 
C)  the average atomic number of its isotopes according to their proportions in nature. 
D)  the atomic mass of its most abundant isotope.

Question 11

The rare earth elements are not

Accepted Answer

A)  extremely rare in the earth's crust. 
B)  found in ores in the United States. 
C)  used in exceptionally strong magnets. 
D)  used in certain lasers and other light sources. 
A)  extremely rare in the earth's crust. 
B)  found in ores in the United States. 
C)  used in exceptionally strong magnets. 
D)  used in certain lasers and other light sources.

Question 12

The name of the compound Ca3N2 is

Accepted Answer

A)  calcium nitride. 
B)  calcium nitrate. 
C)  calcium nitrite. 
D)  calcium trinitride. 
A)  calcium nitride. 
B)  calcium nitrate. 
C)  calcium nitrite. 
D)  calcium trinitride.

Question 13

Which of the following statements is not true of all metals?

Accepted Answer

A)  They conduct heat well. 
B)  They conduct electric current well. 
C)  They are solids at room temperature. 
D)  They are opaque to light. 
A)  They conduct heat well. 
B)  They conduct electric current well. 
C)  They are solids at room temperature. 
D)  They are opaque to light.

Question 14

Which of the following is a homogeneous mixture?

Accepted Answer

A)  blood 
B)  air 
C)  water 
D)  sugar 
A)  blood 
B)  air 
C)  water 
D)  sugar

Question 15

Elements with similar properties other than atomic mass)

Accepted Answer

A)  occupy the same period of the periodic table. 
B)  have similar electron configurations. 
C)  have the same number of neutrons in their nuclei. 
D)  exist in the same physical state solid, liquid, or gas). 
A)  occupy the same period of the periodic table. 
B)  have similar electron configurations. 
C)  have the same number of neutrons in their nuclei. 
D)  exist in the same physical state solid, liquid, or gas).

Question 16

An atom whose outer electron shell lacks one electron from being 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 17

The charge on alkali metal ions is

Accepted Answer

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

Question 18

The missing number in the equation 4NH3 + [ ]O2 → 4NO + 6H2O is

Accepted Answer

A)  1. 
B)  2. 
C)  5. 
D)  10. 
A)  1. 
B)  2. 
C)  5. 
D)  10.

Question 19

The scientist who first established the relative masses of different elements was

Accepted Answer

A)  Mendeleev. 
B)  Maxwell. 
C)  Priestley. 
D)  Dalton. 
A)  Mendeleev. 
B)  Maxwell. 
C)  Priestley. 
D)  Dalton.

Atoms of two different elements

The number of oxygen atoms in a molecule of aluminum sulfate, Al₂SO₄)₃, is

A bonding molecular orbital

The number of H₂O molecules needed to react with 1 atom of Be to form H₂ and BaOH)₂ is

The least active of the following nonmetals is

Carbon

The largest number of elements are classed as

According to the periodic table, the chemical properties of the elements are periodic functions of their

When atoms join to form a molecule,

The atomic mass of an element is

The rare earth elements are not

The name of the compound Ca₃N₂ is

Which of the following statements is not true of all metals?

Which of the following is a homogeneous mixture?

Elements with similar properties other than atomic mass)

An atom whose outer electron shell lacks one electron from being filled is

The charge on alkali metal ions is

The missing number in the equation 4NH₃ + [ ]O₂ → 4NO + 6H₂O is

The scientist who first established the relative masses of different elements was

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

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Exam 10: The Periodic Law

Atoms of two different elements

The number of oxygen atoms in a molecule of aluminum sulfate, Al2SO4)3, is

A bonding molecular orbital

The number of H2O molecules needed to react with 1 atom of Be to form H2 and BaOH)2 is

The least active of the following nonmetals is

Carbon

The largest number of elements are classed as

According to the periodic table, the chemical properties of the elements are periodic functions of their

When atoms join to form a molecule,

The atomic mass of an element is

The rare earth elements are not

The name of the compound Ca3N2 is

Which of the following statements is not true of all metals?

Which of the following is a homogeneous mixture?

Elements with similar properties other than atomic mass)

An atom whose outer electron shell lacks one electron from being filled is

The charge on alkali metal ions is

The missing number in the equation 4NH3 + [ ]O2 → 4NO + 6H2O is

The scientist who first established the relative masses of different elements was

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 number of oxygen atoms in a molecule of aluminum sulfate, Al₂SO₄)₃, is

The number of H₂O molecules needed to react with 1 atom of Be to form H₂ and BaOH)₂ is

The name of the compound Ca₃N₂ is

The missing number in the equation 4NH₃ + [ ]O₂ → 4NO + 6H₂O is