Question 1

Trace elements in the body make up about 1% of the body weight.

Accepted Answer

A) True 
 B)False  False

Question 2

Name and briefly describe the types of chemical bonds discussed in this chapter.

Accepted Answer

The types of chemical bonds discussed in this chapter are ionic bonds, covalent bonds, and metallic bonds.

Ionic bonds occur when one atom transfers electrons to another, resulting in the formation of positively and negatively charged ions that are attracted to each other.

Covalent bonds occur when atoms share electrons, creating a strong bond between the atoms.

Metallic bonds occur in metals, where the outer electrons of the atoms are free to move throughout the material, creating a "sea" of electrons that hold the metal atoms together.

Question 3

The element oxygen has an atomic number of 8, which means it contains:

Accepted Answer

A) four protons and four neutrons. 
B) eight protons. 
C) eight neutrons. 
D) four protons and four electrons. 
A) four protons and four neutrons. 
B) eight protons. 
C) eight neutrons. 
D) four protons and four electrons. B

Question 4

Atoms become positively charged by gaining protons.

Accepted Answer

A) True 
 B)False

Question 5

The positively charged electrons are found in clouds outside the nucleus of an atom.

Accepted Answer

A) True 
 B)False

Question 6

Match each term to its corresponding descriptive phrase.
-Subatomic particle with a positive charge

Accepted Answer

A) Proton 
B) Neutron 
C) Electron 
D) Isotopes 
E) Ionic bonds
F)Covalent bonds
G)Octet rule
H)Atomic number
I)Atomic mass
J)Hydrogen bonds 
A) Proton 
B) Neutron 
C) Electron 
D) Isotopes 
E) Ionic bonds
F)Covalent bonds
G)Octet rule
H)Atomic number
I)Atomic mass
J)Hydrogen bonds

Question 7

AB + CD → AD + CB is an example of a(n) _____ reaction.

Accepted Answer

A) synthesis 
B) exchange 
C) decomposition 
D) reversible 
A) synthesis 
B) exchange 
C) decomposition 
D) reversible

Question 8

Which type of radiation consists of an electron that is released by the nucleus of an atom?

Accepted Answer

A) Alpha 
B) Beta 
C) Delta 
D) Gamma 
A) Alpha 
B) Beta 
C) Delta 
D) Gamma

Question 9

Hydrogen can form only when the hydrogen atom is covalently bonded to:

Accepted Answer

A) an oxygen atom. 
B) a nitrogen atom. 
C) a fluorine. 
D) any of the above. 
A) an oxygen atom. 
B) a nitrogen atom. 
C) a fluorine. 
D) any of the above.

Question 10

The elements carbon, hydrogen, oxygen, and nitrogen make up which percentage of the human body?

Accepted Answer

A) 50% 
B) 69% 
C) 78% 
D) 96% 
A) 50% 
B) 69% 
C) 78% 
D) 96%

Question 11

Metabolism includes the processes of both anabolism and catabolism.

Accepted Answer

A) True 
 B)False

Question 12

The kind of element is determined by the number of:

Accepted Answer

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

Question 13

The digestion of food is an example of a synthesis reaction.

Accepted Answer

A) True 
 B)False

Question 14

The idea that electrons are found in areas of probability distribution around the nucleus was first proposed by Niels Bohr.

Accepted Answer

A) True 
 B)False

Question 15

The digestion of food is an example of a decomposition reaction.

Accepted Answer

A) True 
 B)False

Question 16

The term atomic weight refers to the average mass number for a particular element based on the typical proportions of different isotopes found in nature.

Accepted Answer

A) True 
 B)False

Question 17

According to the general formula, in decomposition reactions, the number of reactants is usually greater than the number of products.

Accepted Answer

A) True 
 B)False

Question 18

Match each term to its corresponding descriptive phrase.
-Subatomic particle that has a negative charge and is found in a "cloud" surrounding the nucleus of the atom

Accepted Answer

A) Proton 
B) Neutron 
C) Electron 
D) Isotopes 
E) Ionic bonds
F)Covalent bonds
G)Octet rule
H)Atomic number
I)Atomic mass
J)Hydrogen bonds 
A) Proton 
B) Neutron 
C) Electron 
D) Isotopes 
E) Ionic bonds
F)Covalent bonds
G)Octet rule
H)Atomic number
I)Atomic mass
J)Hydrogen bonds

Question 19

Releases a hydrogen ion into a solution, which lowers the pH

Accepted Answer

A)  Acid 
B)  Base 
A)  Acid 
B)  Base

Question 20

When sodium (Na) gives up an electron to chlorine, the result is the formation of a sodium ion (Na⁺) with a positive charge. This happens because there is then one more _____ than _____.

Accepted Answer

A) proton; electron 
B) electron; proton 
C) proton; neutron 
D) electron; neutron 
A) proton; electron 
B) electron; proton 
C) proton; neutron 
D) electron; neutron

Exam 3: Chemistry of Life

Trace elements in the body make up about 1% of the body weight.

Name and briefly describe the types of chemical bonds discussed in this chapter.

The element oxygen has an atomic number of 8, which means it contains:

Atoms become positively charged by gaining protons.

The positively charged electrons are found in clouds outside the nucleus of an atom.

Match each term to its corresponding descriptive phrase. -Subatomic particle with a positive charge

AB + CD → AD + CB is an example of a(n) _____ reaction.

Which type of radiation consists of an electron that is released by the nucleus of an atom?

Hydrogen can form only when the hydrogen atom is covalently bonded to:

The elements carbon, hydrogen, oxygen, and nitrogen make up which percentage of the human body?

Metabolism includes the processes of both anabolism and catabolism.

The kind of element is determined by the number of:

The digestion of food is an example of a synthesis reaction.

The idea that electrons are found in areas of probability distribution around the nucleus was first proposed by Niels Bohr.

The digestion of food is an example of a decomposition reaction.

The term atomic weight refers to the average mass number for a particular element based on the typical proportions of different isotopes found in nature.

According to the general formula, in decomposition reactions, the number of reactants is usually greater than the number of products.

Match each term to its corresponding descriptive phrase. -Subatomic particle that has a negative charge and is found in a "cloud" surrounding the nucleus of the atom

Releases a hydrogen ion into a solution, which lowers the pH

When sodium (Na) gives up an electron to chlorine, the result is the formation of a sodium ion (Na⁺) with a positive charge. This happens because there is then one more _____ than _____.

Organization of the Body

Homeostasis

Biomolecules

Cell Structure

Cell Function

Cell Growth and Development

Introduction to Tissues

Tissue Types

Skin

Skeletal Tissues

Axial Skeleton

Appendicular Skeleton

Articulations

Axial Muscles

Appendicular Muscles

Muscle Contraction

Nervous System Cells

Nerve Signaling

Central Nervous System

Peripheral Nervous System

Autonomic Nervous System

General Senses

Special Senses

Endocrine Regulation

Endocrine Glands

Blood

Heart

Blood Vessels

Circulation of the Blood

Lymphatic System

Innate Immunity

Adaptive Immunity

Stress

Respiratory Tract

Ventilation

Gas Exchange Transport

Upper Digestive Tract

Lower Digestive Tract

Digestion and Absorption

Nutrition and Metabolism

Urinary System

Fluid and Electrolyte Balance

Acid-Base Balance

Male Reproductive System

Female Reproductive System

Growth, Development, and Aging

Genetics and Heredity

Filters

When sodium (Na) gives up an electron to chlorine, the result is the formation of a sodium ion (Na⁺) with a positive charge. This happens because there is then one more _ than _.