Question 1

Which rule states that atoms attempt to acquire an outermost energy level with eight electrons through chemical reactions?

Accepted Answer

A)  octet 
B)  atomic stability 
C)  hybridization 
D)  full energy level 
A)  octet 
B)  atomic stability 
C)  hybridization 
D)  full energy level A

Question 2

If an atom has the atomic number 4 and the atomic mass 9.012 it will have ________ electrons in the first energy level.

Accepted Answer

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

Question 3

The fact that all matter is made up of tiny particles that are in constant motion is known as the

Accepted Answer

A)  first law of thermodynamics. 
B)  energy motion theory. 
C)  kinetic molecular theory. 
D)  first law of solids. 
A)  first law of thermodynamics. 
B)  energy motion theory. 
C)  kinetic molecular theory. 
D)  first law of solids. C

Question 4

Which one of the following is true with regard to the numbers of subatomic particles in an atom?

Accepted Answer

A)  The number of neutrons always equals the number of protons. 
B)  The number of electrons always equals the number of neutrons. 
C)  The atomic number always equals the number of protons. 
D)  The atomic number always equals the number of neutrons. 
A)  The number of neutrons always equals the number of protons. 
B)  The number of electrons always equals the number of neutrons. 
C)  The atomic number always equals the number of protons. 
D)  The atomic number always equals the number of neutrons.

Question 5

Which reaction below produces a salt?

Accepted Answer

A)  KOH + H2O $\rightarrow$K+ + OH- + H2O 
B)  HC2H3O2 + H2O $\rightarrow$ C2H3O2- + H+ + H2O 
C)  HCl + NaOH $\rightarrow$ NaCl + H2O 
D)  C6H12O6 + C6H12O6 $\rightarrow$C12H22O11 + H2O 
A)  KOH + H2O $\rightarrow$K+ + OH- + H2O 
B)  HC2H3O2 + H2O $\rightarrow$ C2H3O2- + H+ + H2O 
C)  HCl + NaOH $\rightarrow$ NaCl + H2O 
D)  C6H12O6 + C6H12O6 $\rightarrow$C12H22O11 + H2O

Question 6

If an atom has the atomic number 4 and the atomic mass 9.012 it will

Accepted Answer

A)  have 5 electrons. 
B)  have 5 neutrons. 
C)  have 9 electrons. 
D)  weigh 13.012 atomic mass units. 
A)  have 5 electrons. 
B)  have 5 neutrons. 
C)  have 9 electrons. 
D)  weigh 13.012 atomic mass units.

Question 7

A solution with a high concentration of hydrogen ions could have a pH of

Accepted Answer

A)  2. 
B)  6. 
C)  9. 
D)  11. 
A)  2. 
B)  6. 
C)  9. 
D)  11.

Question 8

The lower the ___________, the slower the molecules are moving.

Accepted Answer

A)  density 
B)  temperature 
C)  potential energy 
D)  gravity 
A)  density 
B)  temperature 
C)  potential energy 
D)  gravity

Question 9

AgNO3 + NaCl $\rightarrow$AgCl + NaNO3. The AgNO3 in the equation is called a(n)

Accepted Answer

A)  reactant. 
B)  acid. 
C)  product. 
D)  base. 
A)  reactant. 
B)  acid. 
C)  product. 
D)  base.

Question 10

An atom that contains 8 electrons in its outermost energy level is said to be

Accepted Answer

A)  inert. 
B)  reactive. 
C)  a cation. 
D)  a molecule. 
A)  inert. 
B)  reactive. 
C)  a cation. 
D)  a molecule.

Question 11

A particle in the atom that has neither a negative nor a positive electrical charge is the

Accepted Answer

A)  electron. 
B)  element. 
C)  isotope. 
D)  neutron. 
A)  electron. 
B)  element. 
C)  isotope. 
D)  neutron.

Question 12

The statement that energy is never created or destroyed is known as

Accepted Answer

A)  thermodynamics. 
B)  kinetic molecular theory. 
C)  first law of matter and energy. 
D)  law of conservation of energy. 
A)  thermodynamics. 
B)  kinetic molecular theory. 
C)  first law of matter and energy. 
D)  law of conservation of energy.

Question 13

The energy level listed below with the most energetic electrons is

Accepted Answer

A)  1. 
B)  2. 
C)  3. 
D)  None of these. All energy levels contain electrons of equal energy. 
A)  1. 
B)  2. 
C)  3. 
D)  None of these. All energy levels contain electrons of equal energy.

Question 14

All chemical reactions

Accepted Answer

A)  involve the creation of new atoms. 
B)  involve a change in chemical bonds. 
C)  are dangerous. 
D)  create energy. 
A)  involve the creation of new atoms. 
B)  involve a change in chemical bonds. 
C)  are dangerous. 
D)  create energy.

Question 15

An isotope is an atom of an element that varies in mass number due to variation in the number of

Accepted Answer

A)  atoms. 
B)  protons. 
C)  neutrons. 
D)  electrons. 
A)  atoms. 
B)  protons. 
C)  neutrons. 
D)  electrons.

Question 16

A neutral atom with an atomic number of 15 will have ____ electrons in its outermost energy level.

Accepted Answer

A)  3 
B)  5 
C)  8 
D)  15 
A)  3 
B)  5 
C)  8 
D)  15

Question 17

An isotope shows which of the following?

Accepted Answer

A)  A change in atomic number 
B)  Inability to form compounds 
C)  A change in mass number 
D)  More electrons 
A)  A change in atomic number 
B)  Inability to form compounds 
C)  A change in mass number 
D)  More electrons

Question 18

In which one of the following situations do the molecules have the greatest attraction for one another?

Accepted Answer

A)  An ice cube 
B)  Cold tap water 
C)  Water vapor 
D)  Water condensed on your windshield 
A)  An ice cube 
B)  Cold tap water 
C)  Water vapor 
D)  Water condensed on your windshield

Question 19

Because this is happening Water + NaCl $\rightarrow$Na+ + Cl- the solution formed is called

Accepted Answer

A)  ionic. 
B)  an electrolyte. 
C)  salty. 
D)  All of the choices are true. 
A)  ionic. 
B)  an electrolyte. 
C)  salty. 
D)  All of the choices are true.

Question 20

A base can be defined as

Accepted Answer

A)  a hydroxide ion acceptor. 
B)  an attraction between a positive ion and a negative ion. 
C)  a substance that gives up hydrogen ions when dissolved in water. 
D)  a substance that gives up hydroxide groups in a solution. 
A)  a hydroxide ion acceptor. 
B)  an attraction between a positive ion and a negative ion. 
C)  a substance that gives up hydrogen ions when dissolved in water. 
D)  a substance that gives up hydroxide groups in a solution.

Exam 2: The Basics of Life: Chemistry

Which rule states that atoms attempt to acquire an outermost energy level with eight electrons through chemical reactions?

If an atom has the atomic number 4 and the atomic mass 9.012 it will have ________ electrons in the first energy level.

The fact that all matter is made up of tiny particles that are in constant motion is known as the

Which one of the following is true with regard to the numbers of subatomic particles in an atom?

Which reaction below produces a salt?

If an atom has the atomic number 4 and the atomic mass 9.012 it will

A solution with a high concentration of hydrogen ions could have a pH of

The lower the ___________, the slower the molecules are moving.

AgNO3 + NaCl →\rightarrow→ AgCl + NaNO3. The AgNO3 in the equation is called a(n)

An atom that contains 8 electrons in its outermost energy level is said to be

A particle in the atom that has neither a negative nor a positive electrical charge is the

The statement that energy is never created or destroyed is known as

The energy level listed below with the most energetic electrons is

All chemical reactions

An isotope is an atom of an element that varies in mass number due to variation in the number of

A neutral atom with an atomic number of 15 will have ____ electrons in its outermost energy level.

An isotope shows which of the following?

In which one of the following situations do the molecules have the greatest attraction for one another?

Because this is happening Water + NaCl →\rightarrow→ Na+ + Cl- the solution formed is called

A base can be defined as

What Is Biology

Organic Molecules: The Molecules of Life

Cell Structure and Function

Enzymes, Coenzymes, and Energy

Biochemical Pathways: Cellular Respiration

Biochemical Pathways: Photosynthesis

DNA and RNA: The Molecular Basis of Heredity

Cell Division: Proliferation and Reproduction

Patterns of Inheritance

Applications of Biotechnology

Diversity Within Species and Population Genetics

Evolution and Natural Selection

The Formation of Species and Evolutionary Change

Ecosystem Dynamics: The Flow of Energy and Matter

Community Interactions

Population Ecology

Evolutionary and Ecological Aspects of Behavior

The Origin of Life and the Evolution of Cells

The Classification and Evolution of Organisms

The Nature of Microorganisms

The Plant Kingdom

The Animal Kingdom

Materials Exchange in the Body

Nutrition: Food and Diet

The Bodys Control Mechanisms and Immunity

Human Reproduction, Sex, and Sexuality

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AgNO₃ + NaCl $\rightarrow$ AgCl + NaNO₃. The AgNO₃ in the equation is called a(n)

Because this is happening Water + NaCl $\rightarrow$ Na⁺ + Cl^- the solution formed is called