Question 1

An atom that has lost electrons is a

Accepted Answer

A)  cation. 
B)  neutral atom. 
C)  molecule. 
D)  anion. 
A)  cation. 
B)  neutral atom. 
C)  molecule. 
D)  anion.

Question 2

6CO2 + 6H2O $\rightarrow$C6H12O2 + 6O2. In this reaction O2 is

Accepted Answer

A)  a reactant. 
B)  a product. 
C)  a reactant and a product. 
D)  neither a reactant nor a product. 
A)  a reactant. 
B)  a product. 
C)  a reactant and a product. 
D)  neither a reactant nor a product.

Question 3

A list of all of the elements in order of increasing atomic number is called the

Accepted Answer

A)  pH. 
B)  law of thermodynamics. 
C)  phase of matter. 
D)  periodic table. 
A)  pH. 
B)  law of thermodynamics. 
C)  phase of matter. 
D)  periodic table.

Question 4

One atom of sodium has a mass number of 22 units; another atom of sodium is 23 units. These two atoms are

Accepted Answer

A)  nonreactive. 
B)  unstable. 
C)  ions. 
D)  isotopes. 
A)  nonreactive. 
B)  unstable. 
C)  ions. 
D)  isotopes.

Question 5

A person jogging displays what kind of energy?

Accepted Answer

A)  potential 
B)  kinetic 
C)  nuclear 
D)  sweat 
A)  potential 
B)  kinetic 
C)  nuclear 
D)  sweat

Question 6

The smallest particle of an element that still retains the properties of that element is a(n)

Accepted Answer

A)  atom. 
B)  proton. 
C)  electron. 
D)  element. 
A)  atom. 
B)  proton. 
C)  electron. 
D)  element.

Question 7

When electrons in a covalent bond are not equally shared, the molecule is said to be

Accepted Answer

A)  polar. 
B)  nonpolar. 
C)  lopsided. 
D)  unable to form hydrogen bonds. 
A)  polar. 
B)  nonpolar. 
C)  lopsided. 
D)  unable to form hydrogen bonds.

Question 8

If an atom has the atomic number 11 and the atomic mass 22.99, it will have

Accepted Answer

A)  1 electron in the third energy level. 
B)  1 electron in the second energy level. 
C)  3 electrons in the fourth energy level. 
D)  1 electron in the first energy level. 
A)  1 electron in the third energy level. 
B)  1 electron in the second energy level. 
C)  3 electrons in the fourth energy level. 
D)  1 electron in the first energy level.

Question 9

An atomic particle with a weight of one, and a positive electrical charge is a(n)

Accepted Answer

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

Question 10

A solution that contains an excess of protons is(are)

Accepted Answer

A)  hydroxide ions. 
B)  an acid. 
C)  a base. 
D)  the pH. 
A)  hydroxide ions. 
B)  an acid. 
C)  a base. 
D)  the pH.

Question 11

A chemical reactant is one that

Accepted Answer

A)  enters into a chemical reaction. 
B)  is the newly formed molecule. 
C)  is at a point when both sides of the equation are equal. 
D)  during photosynthesis, is one molecule of sugar and six molecules of oxygen. 
A)  enters into a chemical reaction. 
B)  is the newly formed molecule. 
C)  is at a point when both sides of the equation are equal. 
D)  during photosynthesis, is one molecule of sugar and six molecules of oxygen.

Question 12

A measure of the average kinetic energy of the molecules making up a substance is known as

Accepted Answer

A)  temperature. 
B)  heat. 
C)  potential. 
D)  phase of matter. 
A)  temperature. 
B)  heat. 
C)  potential. 
D)  phase of matter.

Question 13

HCl + NaOH $\rightarrow$NaCl + H2O. This reaction is an example of a(n)

Accepted Answer

A)  oxidation/reduction reaction. 
B)  hydrolysis reaction. 
C)  phosphorylation reaction. 
D)  acid-base reaction. 
A)  oxidation/reduction reaction. 
B)  hydrolysis reaction. 
C)  phosphorylation reaction. 
D)  acid-base reaction.

Question 14

The atomic number for carbon is 6. The isotope 14C has ____ neutrons.

Accepted Answer

A)  6 
B)  8 
C)  14 
D)  20 
A)  6 
B)  8 
C)  14 
D)  20

Question 15

The fact that the atomic weight of carbon is 12.0112 probably indicates that carbon atoms vary in the number of _______ they contain.

Accepted Answer

A)  electrons 
B)  protons 
C)  neutrons 
D)  nuclei 
A)  electrons 
B)  protons 
C)  neutrons 
D)  nuclei

Question 16

The pH of a strong base is closest to

Accepted Answer

A)  2. 
B)  6. 
C)  9. 
D)  12. 
A)  2. 
B)  6. 
C)  9. 
D)  12.

Question 17

A magnesium ion contains twelve protons and ten electrons. A chloride ion contains seventeen protons and eighteen electrons. Given this information, the chemical formula for magnesium chloride is

Accepted Answer

A)  MgCl. 
B)  Mg2Cl. 
C)  MgCl2. 
D)  Mg2Cl2. 
A)  MgCl. 
B)  Mg2Cl. 
C)  MgCl2. 
D)  Mg2Cl2.

Question 18

A covalent bond is

Accepted Answer

A)  the attraction that one atom has for another atom. 
B)  the attraction between two atoms, formed by the sharing of electrons. 
C)  formed between the positive charge of a hydrogen atom in one molecule and the negative charge of a nitrogen atom in another nearby molecule. 
D)  the attraction between a positive ion and a negative ion. 
A)  the attraction that one atom has for another atom. 
B)  the attraction between two atoms, formed by the sharing of electrons. 
C)  formed between the positive charge of a hydrogen atom in one molecule and the negative charge of a nitrogen atom in another nearby molecule. 
D)  the attraction between a positive ion and a negative ion.

Question 19

The part of an atom without a charge is a(n)

Accepted Answer

A)  ion. 
B)  neutron. 
C)  electron. 
D)  molecule. 
A)  ion. 
B)  neutron. 
C)  electron. 
D)  molecule.

Question 20

Human blood has a pH of about 7.4. If the pH should change to 7.0, this would indicate

Accepted Answer

A)  a decrease in pH. 
B)  an increase in acidity. 
C)  a change in electrolytes. 
D)  All the choices are correct. 
A)  a decrease in pH. 
B)  an increase in acidity. 
C)  a change in electrolytes. 
D)  All the choices are correct.

Exam 2: The Basics of Life: Chemistry

An atom that has lost electrons is a

6CO2 + 6H2O →\rightarrow→ C6H12O2 + 6O2. In this reaction O2 is

A list of all of the elements in order of increasing atomic number is called the

One atom of sodium has a mass number of 22 units; another atom of sodium is 23 units. These two atoms are

A person jogging displays what kind of energy?

The smallest particle of an element that still retains the properties of that element is a(n)

When electrons in a covalent bond are not equally shared, the molecule is said to be

If an atom has the atomic number 11 and the atomic mass 22.99, it will have

An atomic particle with a weight of one, and a positive electrical charge is a(n)

A solution that contains an excess of protons is(are)

A chemical reactant is one that

A measure of the average kinetic energy of the molecules making up a substance is known as

HCl + NaOH →\rightarrow→ NaCl + H2O. This reaction is an example of a(n)

The atomic number for carbon is 6. The isotope 14C has ____ neutrons.

The fact that the atomic weight of carbon is 12.0112 probably indicates that carbon atoms vary in the number of _______ they contain.

The pH of a strong base is closest to

A magnesium ion contains twelve protons and ten electrons. A chloride ion contains seventeen protons and eighteen electrons. Given this information, the chemical formula for magnesium chloride is

A covalent bond is

The part of an atom without a charge is a(n)

Human blood has a pH of about 7.4. If the pH should change to 7.0, this would indicate

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

Filters

6CO₂ + 6H₂O $\rightarrow$ C₆H₁₂O₂ + 6O₂. In this reaction O₂ is

HCl + NaOH $\rightarrow$ NaCl + H₂O. This reaction is an example of a(n)

The atomic number for carbon is 6. The isotope ¹⁴C has ____ neutrons.