Question 1

The amount of radiation measured by 1 Bq is larger than that measured by 1 Ci.

Accepted Answer

A) True 
 B)False

Question 2

When beta particles are emitted,the atomic number decreases.

Accepted Answer

A) True 
 B)False

Question 3

The process in which a nucleus spontaneously breaks down by emitting radiation is known as ________.

Accepted Answer

A) transformation 
B) translation 
C) fusion 
D) a chain reaction 
E) radioactive decay

Question 4

What is the radioactive particle released in the following nuclear equation? 
 Sr →  Y + ?

Accepted Answer

A) alpha particle 
B) beta particle 
C) positron 
D) proton 
E) neutron

Question 5

When an atom of uranium-235 is bombarded with neutrons,it splits into smaller nuclei and produces a great amount of energy.This nuclear process is called ________.

Accepted Answer

A) fission 
B) fusion 
C) decomposition 
D) chain reaction 
E) ionization

Question 6

The production of nitrogen-13 and a neutron from boron-10 by bombardment with a helium-4 nucleus is an example of radioactive decay.

Accepted Answer

A) True 
 B)False

Question 7

The shielding required for gamma rays is ________.

Accepted Answer

The answer of The shielding required for gamma rays is...

Question 8

The half-life of bromine-74 is 25 min.How much of a 4.0 mg sample is still active after 75 min?

Accepted Answer

A) 0.50 mg 
B) 1.0 mg 
C) 2.0 mg 
D) 0.25 mg 
E) 4.0 mg

Question 9

The rem is a unit that measures the biological effect of radiation.

Accepted Answer

A) True 
 B)False

Question 10

An imaging technique that detects the energy absorbed by hydrogen atoms in a magnetic field is known as ________.

Accepted Answer

A) positron emission tomography (PET) 
B) computed tomography (CT) 
C) magnetic resonance imaging (MRI) 
D) radioactive tracer study 
E) supermagnetic tomography (SMT)

Question 11

The nuclear symbol of helium,  He,is also the symbol for designating a(n)________.

Accepted Answer

A) proton 
B) neutron 
C) gamma ray 
D) beta particle 
E) alpha particle

Question 12

The correct symbol for hydrogen-3 is  He.

Accepted Answer

A) True 
 B)False

Question 13

X-rays are emitted during MRI scans.

Accepted Answer

A) True 
 B)False

Question 14

A wooden object from a prehistoric site has a carbon-14 activity of 10 cpm compared to 40 cpm for new wood.If carbon-14 has a half-life of 5730 yr,what is the age of the wood?

Accepted Answer

A) 1430 yr 
B) 5730 yr 
C) 11 500 yr 
D) 17 200 yr 
E) 22 900 yr

Question 15

Gamma rays require the heaviest shielding of all the common types of nuclear radiation because gamma rays have the ________.

Accepted Answer

A) highest energy 
B) most intense color 
C) lowest energy 
D) largest particles 
E) heaviest particles

Question 16

When aluminum-27 is bombarded with a neutron,a gamma ray is emitted.What radioactive isotope is produced?

Accepted Answer

A) silicon-27 
B) silicon-28 
C) aluminum-28 
D) magnesium-27 
E) magnesium-28

Question 17

Sodium-24 has a half-life of 15 h.How many hours is three half-lives?

Accepted Answer

A) 60 h 
B) 45 h 
C) 30 h 
D) 15 h 
E) 7.5 h

Question 18

The recommended dosage of I-131 for a test is 4.2 μCi per kg of body mass.How many millicuries should be given to a 55 kg patient? (1 mCi = 1000 μCi)?

Accepted Answer

A) 230 mCi 
B) 0.23 mCi 
C) 0.076 mCi 
D) 760 mCi 
E) 13.8 mCi

Question 19

A nuclear equation is balanced when ________.

Accepted Answer

A) the same elements are found on both sides of the equation 
B) the sum of the mass numbers and the sum of the atomic numbers of the particles and atoms are the same on both sides of the equation 
C) the same particles and atoms are on both sides of the equation 
D) different particles and atoms are on both sides of the equation 
E) the charges of the particles and atoms are the same on both sides of the equation

Question 20

For  Sr,there are ________.

Accepted Answer

A) 85 protons and 38 neutrons 
B) 47 protons and 38 neutrons 
C) 38 protons and 47 neutrons 
D) 38 protons and 85 neutrons 
E) 85 protons and 47 neutrons

Exam 5: Nuclear Chemistry

The amount of radiation measured by 1 Bq is larger than that measured by 1 Ci.

When beta particles are emitted,the atomic number decreases.

The process in which a nucleus spontaneously breaks down by emitting radiation is known as ________.

What is the radioactive particle released in the following nuclear equation? Sr → Y + ?

When an atom of uranium-235 is bombarded with neutrons,it splits into smaller nuclei and produces a great amount of energy.This nuclear process is called ________.

The production of nitrogen-13 and a neutron from boron-10 by bombardment with a helium-4 nucleus is an example of radioactive decay.

The shielding required for gamma rays is ________.

The half-life of bromine-74 is 25 min.How much of a 4.0 mg sample is still active after 75 min?

The rem is a unit that measures the biological effect of radiation.

An imaging technique that detects the energy absorbed by hydrogen atoms in a magnetic field is known as ________.

The nuclear symbol of helium, He,is also the symbol for designating a(n) ________.

The correct symbol for hydrogen-3 is He.

X-rays are emitted during MRI scans.

A wooden object from a prehistoric site has a carbon-14 activity of 10 cpm compared to 40 cpm for new wood.If carbon-14 has a half-life of 5730 yr,what is the age of the wood?

Gamma rays require the heaviest shielding of all the common types of nuclear radiation because gamma rays have the ________.

When aluminum-27 is bombarded with a neutron,a gamma ray is emitted.What radioactive isotope is produced?

Sodium-24 has a half-life of 15 h.How many hours is three half-lives?

The recommended dosage of I-131 for a test is 4.2 μCi per kg of body mass.How many millicuries should be given to a 55 kg patient? (1 mCi = 1000 μCi) ?

A nuclear equation is balanced when ________.

For Sr,there are ________.