Question 1

When radium (A = 88)emits an alpha particle,the resulting nucleus has atomic number

Accepted Answer

A) 86. 
B) 88. 
C) 90. 
D) 92. 
E) none of these 
A) 86. 
B) 88. 
C) 90. 
D) 92. 
E) none of these

Question 2

The high temperature of the Earth's interior is due mostly to

Accepted Answer

A) great internal pressure. 
B) friction,as plates move past one another. 
C) the Earth's natural heat. 
D) radioactivity. 
A) great internal pressure. 
B) friction,as plates move past one another. 
C) the Earth's natural heat. 
D) radioactivity.

Question 3

Which radiation has no electric charge associated with it?

Accepted Answer

A) alpha rays 
B) beta rays 
C) gamma rays 
D) all of these 
E) none of these 
A) alpha rays 
B) beta rays 
C) gamma rays 
D) all of these 
E) none of these

Question 4

A gram of radioactive material has a half-life of one year.After 4 years,how much radioactive material will be left?

Accepted Answer

A) 0 g 
B) 1/2 g 
C) 1/4 g 
D) 1/8 g 
E) none of these 
A) 0 g 
B) 1/2 g 
C) 1/4 g 
D) 1/8 g 
E) none of these

Question 5

When a gamma ray is emitted by a nucleus,the nucleus then has appreciably less

Accepted Answer

A) mass. 
B) charge. 
C) both of these 
D) neither of these 
A) mass. 
B) charge. 
C) both of these 
D) neither of these

Question 6

In bubble chambers,charged particles move in spirals because

Accepted Answer

A) the magnetic field decreases. 
B) the electric charge decreases. 
C) the electric charge increases. 
D) of perspective and parallax. 
E) of energy dissipation. 
A) the magnetic field decreases. 
B) the electric charge decreases. 
C) the electric charge increases. 
D) of perspective and parallax. 
E) of energy dissipation.

Question 7

All deposits of natural uranium contain appreciable amounts of

Accepted Answer

A) iron. 
B) lead. 
C) gold. 
D) all of these 
E) none of these particularly 
A) iron. 
B) lead. 
C) gold. 
D) all of these 
E) none of these particularly

Question 8

The half-lives of elements beyond uranium are too short for these elements to occur in natural deposits.But elements below uranium that have equally short half-lives do occur in natural deposits.This is because they are

Accepted Answer

A) the small leftover of huge abundances when the Earth formed. 
B) subdued and preserved by pressures beneath the Earth. 
C) bound with longer-living elements. 
D) the products of uranium decay. 
A) the small leftover of huge abundances when the Earth formed. 
B) subdued and preserved by pressures beneath the Earth. 
C) bound with longer-living elements. 
D) the products of uranium decay.

Exam 33: Atomic Nucleus and Radioactivity

When radium (A = 88)emits an alpha particle,the resulting nucleus has atomic number

The high temperature of the Earth's interior is due mostly to

Which radiation has no electric charge associated with it?

A gram of radioactive material has a half-life of one year.After 4 years,how much radioactive material will be left?

When a gamma ray is emitted by a nucleus,the nucleus then has appreciably less

In bubble chambers,charged particles move in spirals because

All deposits of natural uranium contain appreciable amounts of

The half-lives of elements beyond uranium are too short for these elements to occur in natural deposits.But elements below uranium that have equally short half-lives do occur in natural deposits.This is because they are

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