Question 1

14C is heavier than12C because it has ____.

Accepted Answer

A)  two more electrons than12C 
B)  two more neutrons than12C 
C)  two more protons than12C 
D)  two more protons and two more electrons than12C 
E)  one more proton and one more neutron than12C 
A)  two more electrons than12C 
B)  two more neutrons than12C 
C)  two more protons than12C 
D)  two more protons and two more electrons than12C 
E)  one more proton and one more neutron than12C

Question 2

Match between columns
                        Premises: compound
element
isotope
orbital
matter

Accepted Answer

The Answer of The locations around an atomic nucleus where is...

Question 3

Figure 2.1
-
Answer the question using the accompanying figure. The mass number of the atom depicted in the figure is ____.

Accepted Answer

A)  4 
B)  6 
C)  8 
D)  12 
E)  18 
A)  4 
B)  6 
C)  8 
D)  12 
E)  18

Question 4

Explain how radiometric dating allows scientists to determine the age of a particular fossil.

Accepted Answer

Radioactive isotopes decay in a very pre

Question 5

In a molecule of methane, CH4, each hydrogen atom shares an orbital with the carbon atom. The total number of shared electrons in CH4is ____.

Accepted Answer

A)  one 
B)  two 
C)  four 
D)  five 
E)  eight 
A)  one 
B)  two 
C)  four 
D)  five 
E)  eight

Question 6

Electronegativity is the tendency of an atom to attract ____ to itself in a chemical bond.

Accepted Answer

A)  neutrons 
B)  protons 
C)  electrons 
D)  delta forces 
E)  polar associations 
A)  neutrons 
B)  protons 
C)  electrons 
D)  delta forces 
E)  polar associations

Question 7

Figure 2.2
-
Answer the question using the accompanying figure. The electrons at the lowest energy level in the neon atom depicted are found in which orbital?

Accepted Answer

A)  1 s 
B)  2 s 
C)  2 p x 
D)  2 p y 
E)  2 p z 
A)  1 s 
B)  2 s 
C)  2 p x 
D)  2 p y 
E)  2 p z

Question 8

Water has a molecular weight of 18 g per mole, and glucose has a molecular weight of 180 g per mole. Which masses of water and glucose would have an approximately equal number of molecules?

Accepted Answer

A)  1 g of water and 180 g of glucose 
B)  90 g of water and 9 g of glucose 
C)  180 g of water and 1 g of glucose 
D)  9 g of water and 90 g of glucose 
E)  90 g of water and 90 g of glucose 
A)  1 g of water and 180 g of glucose 
B)  90 g of water and 9 g of glucose 
C)  180 g of water and 1 g of glucose 
D)  9 g of water and 90 g of glucose 
E)  90 g of water and 90 g of glucose

Question 9

The smallest unit that retains the chemical and physical properties of an element is a(n) ____.

Accepted Answer

A)  proton 
B)  compound 
C)  molecule 
D)  neutron 
E)  atom 
A)  proton 
B)  compound 
C)  molecule 
D)  neutron 
E)  atom

Question 10

If van der Waals forces are weak, how can geckos utilize these forces to cling to and walk up vertical smooth surfaces?

Accepted Answer

The toes of geckos are covered by millio

Question 11

Four elements, including ____, make up more than 96.5% of the mass of most living organisms.

Accepted Answer

A)  sodium 
B)  potassium 
C)  phosphorus 
D)  nitrogen 
E)  calcium 
A)  sodium 
B)  potassium 
C)  phosphorus 
D)  nitrogen 
E)  calcium

Question 12

Which of the three atomic particles are charged?

Accepted Answer

A)  electrons and protons 
B)  neutrons only 
C)  protons and neutrons 
D)  electrons only 
E)  protons, neutrons, and electrons 
A)  electrons and protons 
B)  neutrons only 
C)  protons and neutrons 
D)  electrons only 
E)  protons, neutrons, and electrons

Question 13

Buffers can increase the pH of a solution when acids are added.

Accepted Answer

A) True 
 B)False

Question 14

When sugar dissolves in water, water is acting as a ____ and the sugar molecules are acting as ____.

Accepted Answer

A)  solution; solvents 
B)  solute; solutions 
C)  solvent; solutes 
D)  solute; solvents 
E)  solvent; solutions 
A)  solution; solvents 
B)  solute; solutions 
C)  solvent; solutes 
D)  solute; solvents 
E)  solvent; solutions

Question 15

Atoms with atomic numbers between lithium and neon have two energy levels.

Accepted Answer

A) True 
 B)False

Question 16

The chemical linkages that exert an attractive force over the greatest distance are ____.

Accepted Answer

A)  polar covalent bonds 
B)  van der Waals forces 
C)  ionic bonds 
D)  hydrogen bonds 
E)  nonpolar covalent bonds 
A)  polar covalent bonds 
B)  van der Waals forces 
C)  ionic bonds 
D)  hydrogen bonds 
E)  nonpolar covalent bonds

Question 17

A pH of 6 is ____ times more ____ than a pH of 2.

Accepted Answer

A)  3; acidic 
B)  4; acidic 
C)  3; basic 
D)  10,000; basic 
E)  40; basic 
A)  3; acidic 
B)  4; acidic 
C)  3; basic 
D)  10,000; basic 
E)  40; basic

Question 18

When the isotope14C undergoes radioactive decay, a neutron splits into an electron and a proton, with ejection of the electron. This decay produces an atom of ____.

Accepted Answer

A)  iron 
B)  carbon 
C)  hydrogen 
D)  oxygen 
E)  nitrogen 
A)  iron 
B)  carbon 
C)  hydrogen 
D)  oxygen 
E)  nitrogen

Question 19

Pure water has a pH of 7.0, therefore, ____.

Accepted Answer

A)  [H+]-] 
B)  [H+] = [OH-] 
C)  [H+] = 0 
D)  [OH-] = 0 
E)  [H+]>[OH-] 
A)  [H+]-] 
B)  [H+] = [OH-] 
C)  [H+] = 0 
D)  [OH-] = 0 
E)  [H+]>[OH-]

Question 20

An orbital describes the ____ of an electron.

Accepted Answer

A)  exact location 
B)  exact path 
C)  most frequent locations 
D)  charge 
E)  chemical bonds 
A)  exact location 
B)  exact path 
C)  most frequent locations 
D)  charge 
E)  chemical bonds

Exam 2: Life, Chemistry, and Water

14C is heavier than12C because it has ____.

Figure 2.1 - Answer the question using the accompanying figure. The mass number of the atom depicted in the figure is ____.

Explain how radiometric dating allows scientists to determine the age of a particular fossil.

In a molecule of methane, CH4, each hydrogen atom shares an orbital with the carbon atom. The total number of shared electrons in CH4is ____.

Electronegativity is the tendency of an atom to attract ____ to itself in a chemical bond.

Figure 2.2 - Answer the question using the accompanying figure. The electrons at the lowest energy level in the neon atom depicted are found in which orbital?

Water has a molecular weight of 18 g per mole, and glucose has a molecular weight of 180 g per mole. Which masses of water and glucose would have an approximately equal number of molecules?

The smallest unit that retains the chemical and physical properties of an element is a(n) ____.

If van der Waals forces are weak, how can geckos utilize these forces to cling to and walk up vertical smooth surfaces?

Four elements, including ____, make up more than 96.5% of the mass of most living organisms.

Which of the three atomic particles are charged?

Buffers can increase the pH of a solution when acids are added.

When sugar dissolves in water, water is acting as a ____ and the sugar molecules are acting as ____.

Atoms with atomic numbers between lithium and neon have two energy levels.

The chemical linkages that exert an attractive force over the greatest distance are ____.

A pH of 6 is ____ times more ____ than a pH of 2.

When the isotope14C undergoes radioactive decay, a neutron splits into an electron and a proton, with ejection of the electron. This decay produces an atom of ____.

Pure water has a pH of 7.0, therefore, ____.

An orbital describes the ____ of an electron.

Introduction to Biological Concepts and Research

Biological Molecules: the Carbon Compounds of Life

Cells

Membranes and Transport

Energy, Enzymes, and Biological Reactions

Cellular Respiration: Harvesting Chemical Energy

Photosynthesis

Cell Communication

Cell Division and Mitosis

Meiosis: the Cellular Basis of Sexual Reproduction

Mendel, Genes, and Inheritance

Genes, Chromosomes, and Human Genetics

Dna Structure, Replication, and Organization

Gene Expression: From Dna to Protein

Regulation of Gene Expression

Bacterial and Viral Genetics

Dna Technology: Making and Using Genetically Altered Organisms, and Other Applications

Genomes and Proteomes

The Development of Evolutionary Thought

Microevolution: Genetic Changes Within Populations

Speciation

Paleobiology and Macroevolution

Systematic Biology: Phylogeny and Classification

The Origin of Life

Prokaryotes and Viruses

Protists

Seedless Plants

Seed Plants

Fungi

Animal Phylogeny, Acoelomates, and Protostomes

Deuterostomes: Vertebrates and Their Closest Relatives

The Plant Body

Transport in Plants

Plant Nutrition

Reproduction and Development in Flowering Plants

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Information Flow and the Neuron

Nervous Systems

Sensory Systems

The Endocrine System

Muscles, Bones, and Body Movements

The Circulatory System

Defenses Against Disease

Gas Exchange: the Respiratory System

Digestive Systems and Animal Nutrition

Regulating the Internal Environment: Osmoregulation, Excretion, and Thermoregulation

Animal Reproduction

Animal Development

Ecology and the Biosphere

Population Ecology

Population Interactions and Community Ecology

Ecosystems

Biodiversity and Conservation Biology

Animal Behavior

Filters

14C is heavier than¹²C because it has ____.

In a molecule of methane, CH₄, each hydrogen atom shares an orbital with the carbon atom. The total number of shared electrons in CH₄is ____.

When sugar dissolves in water, water is acting as a and the sugar molecules are acting as .

A pH of 6 is times more than a pH of 2.

When the isotope¹⁴C undergoes radioactive decay, a neutron splits into an electron and a proton, with ejection of the electron. This decay produces an atom of ____.