Radon Review Quiz 2 Questions and Answers with Complete Solutions 100%
Correct New Update.
Radon Review Quiz 2
200 Multiple-Choice Practice Questions with Answers & Rationales
Complete Solutions – 100% Correct | New Update
Section 1: Radon Fundamentals & Physics (Questions 1-40)
Question 1
Which of the following are characteristics of radon?
A) Has no static charge, solid particle, does not react chemically
B) Is a gas, radioactive, can be detected by human senses
C) Is man-made, does not chemically react, is a gas
D) Is not detected by human senses, is naturally occurring, does not chemically
react
Answer: D
Rationale: Radon is a naturally occurring radioactive gas that is colorless, odorless,
and tasteless, making it undetectable by human senses. It is chemically inert and
does not react with other substances under normal conditions .
,Question 2
The nucleus of an atom consists of:
A) Electrons and protons
B) Neutrons and electrons
C) Protons and neutrons
D) Protons, neutrons, and electrons
Answer: C
Rationale: The atomic nucleus contains protons (positively charged) and neutrons
(neutral). Electrons orbit the nucleus and are not part of the nucleus itself .
Question 3
The characteristic of an atom that determines which element it is is:
A) The number of electrons
B) The number of neutrons
C) The number of protons
D) The number of protons and neutrons
,Answer: C
Rationale: The atomic number, which is the number of protons in the nucleus,
uniquely identifies an element. Changing the number of protons changes the
element itself .
Question 4
The annual average U.S. outdoor and indoor radon levels are:
A) 0.4 pCi/L outdoors and 1.3 pCi/L indoors
B) 0.5 pCi/L outdoors and 4.0 pCi/L indoors
C) 0.6 pCi/L outdoors and 4.0 pCi/L indoors
D) 0.7 pCi/L outdoors and 1.3 pCi/L indoors
Answer: A
Rationale: The typical outdoor radon concentration is approximately 0.4 pCi/L,
while the average indoor level in U.S. homes is about 1.3 pCi/L. These baseline
levels help establish action thresholds .
Question 5
, An ion is an atom that:
A) Cannot accept additional electrons
B) Cannot eliminate additional electrons
C) Has lost or gained electrons
D) Has no electrons
Answer: C
Rationale: An ion forms when a neutral atom gains or loses electrons, resulting in
a net electrical charge. Loss of electrons creates a positive ion (cation), while gain
creates a negative ion (anion) .
Question 6
One picoCurie per liter of radon is defined as:
A) One billionth of a Curie
B) 2.22 disintegrations per minute per gram of air
C) 2.22 disintegrations per minute within a liter of air
D) 37 billion disintegrations per second
Correct New Update.
Radon Review Quiz 2
200 Multiple-Choice Practice Questions with Answers & Rationales
Complete Solutions – 100% Correct | New Update
Section 1: Radon Fundamentals & Physics (Questions 1-40)
Question 1
Which of the following are characteristics of radon?
A) Has no static charge, solid particle, does not react chemically
B) Is a gas, radioactive, can be detected by human senses
C) Is man-made, does not chemically react, is a gas
D) Is not detected by human senses, is naturally occurring, does not chemically
react
Answer: D
Rationale: Radon is a naturally occurring radioactive gas that is colorless, odorless,
and tasteless, making it undetectable by human senses. It is chemically inert and
does not react with other substances under normal conditions .
,Question 2
The nucleus of an atom consists of:
A) Electrons and protons
B) Neutrons and electrons
C) Protons and neutrons
D) Protons, neutrons, and electrons
Answer: C
Rationale: The atomic nucleus contains protons (positively charged) and neutrons
(neutral). Electrons orbit the nucleus and are not part of the nucleus itself .
Question 3
The characteristic of an atom that determines which element it is is:
A) The number of electrons
B) The number of neutrons
C) The number of protons
D) The number of protons and neutrons
,Answer: C
Rationale: The atomic number, which is the number of protons in the nucleus,
uniquely identifies an element. Changing the number of protons changes the
element itself .
Question 4
The annual average U.S. outdoor and indoor radon levels are:
A) 0.4 pCi/L outdoors and 1.3 pCi/L indoors
B) 0.5 pCi/L outdoors and 4.0 pCi/L indoors
C) 0.6 pCi/L outdoors and 4.0 pCi/L indoors
D) 0.7 pCi/L outdoors and 1.3 pCi/L indoors
Answer: A
Rationale: The typical outdoor radon concentration is approximately 0.4 pCi/L,
while the average indoor level in U.S. homes is about 1.3 pCi/L. These baseline
levels help establish action thresholds .
Question 5
, An ion is an atom that:
A) Cannot accept additional electrons
B) Cannot eliminate additional electrons
C) Has lost or gained electrons
D) Has no electrons
Answer: C
Rationale: An ion forms when a neutral atom gains or loses electrons, resulting in
a net electrical charge. Loss of electrons creates a positive ion (cation), while gain
creates a negative ion (anion) .
Question 6
One picoCurie per liter of radon is defined as:
A) One billionth of a Curie
B) 2.22 disintegrations per minute per gram of air
C) 2.22 disintegrations per minute within a liter of air
D) 37 billion disintegrations per second
