What is the process in which an unstable atomic nucleus emits charged particles

Question

What is the process in which an unstable atomic nucleus emits charged particles or energy or both?

Select one:

a. radioactive decay

b. oxidation

c. atomic synthesis

d. none of the above

Question2

Not yet answered

Marked out of 1.00

Flag question

Question text

What type of nuclear decay releases energy but not a particle?

Select one:

a. alpha decay

b. beta decay

c. gamma decay

d. positron decay

Question3

Not yet answered

Marked out of 1.00

Flag question

Question text

The half-life of a radioisotope is the amount of time it takes for

Select one:

a. half the sample to decay.

b. all the sample to decay.

c. the age of an artifact to be calculated.

d. detectable radiation to be absorbed by a sample.

Question4

Not yet answered

Marked out of 1.00

Flag question

Question text

The half-life of tritium, or hydrogen-3, is 12.32 years. After about 24.6 years, how much of a sample of tritium will remain unchanged?

Select one:

a. all of it

b. 1/4

c. 1/2

d. 1/8

Question5

Not yet answered

Marked out of 1.00

Flag question

Question text

Why does a nucleus decay?

Select one:

a. The electrons around the nucleus pull the nucleus apart.

b. Protons decay spontaneously when exposed to the strong nuclear force.

c. It wants to gain a perfect proton to neutron ratio.

d. It gets old and breaks down.

Question6

Not yet answered

Marked out of 3.00

Flag question

Question text

What types of materials are minimally sufficient to stop the following particles or energy emissions?

alpha particle

gamma ray

beta particle

Question7

Not yet answered

Marked out of 1.00

Flag question

Question text

In smaller atoms there are generally similar numbers of protons and neutrons in the nucleus, but in very heavy atoms there are many more neutrons than protons. Why?

Select one:

a. Neutrons help provide the strong force that holds the large number of protons together in the nucleus.

b. Large atoms must always have a 2:1 ratio of neutrons to protons because protons are so much bigger.

c. Neutrons have a half-negative charge and must balance the large positive charge of protons.

d. There are always more protons than neutrons in large atoms, not the other way around.

Question8

Not yet answered

Marked out of 1.00

Flag question

Question text

You'll need a periodic table to answer this question, and you might need to review alpha decay in the video.

Americium-241 (Am-241) is a large isotope that undergoes alpha decay. Other than alpha particle emission, what else is produced?

Select one:

a. Uranium-241 (U-241)

b. Neptunium-237 (Np-237)

alpha particle

Answer 1Choose...sheet of aluminumsheet of paperblock of lead

gamma ray

Answer 2Choose...sheet of aluminumsheet of paperblock of lead

beta particle

Answer 3Choose...sheet of aluminumsheet of paperblock of lead

Explanation / Answer

What is the process in which an unstable atomic nucleus emits charged particles or energy or both?

a. radioactive decay

Question2

What type of nuclear decay releases energy but not a particle?

Select one:

c. gamma decay

Question3

The half-life of a radioisotope is the amount of time it takes for

Select one:

a. half the sample to decay.

Question4

The half-life of tritium, or hydrogen-3, is 12.32 years. After about 24.6 years, how much of a sample of tritium will remain unchanged?

Select one:

b. 1/4

(Since 24.6 years = 2 half lives. Thus the sample would go from 1 ---> 1/2 ----> 1/4 )

Question5

Why does a nucleus decay?

Select one:

c. It wants to gain a perfect proton to neutron ratio.

Question6

Not yet answered

Marked out of 3.00

Flag question

Question text

What types of materials are minimally sufficient to stop the following particles or energy emissions?

alpha particle

gamma ray

beta particle

Question7

In smaller atoms there are generally similar numbers of protons and neutrons in the nucleus, but in very heavy atoms there are many more neutrons than protons. Why?

Select one:

a. Neutrons help provide the strong force that holds the large number of protons together in the nucleus.

Question8

You'll need a periodic table to answer this question, and you might need to review alpha decay in the video.

Americium-241 (Am-241) is a large isotope that undergoes alpha decay. Other than alpha particle emission, what else is produced?

Select one:

b. Neptunium-237 (Np-237)

The atomic mass number must decrease by 4 in an alpha decay.

Thus, Am241 will become 241 - 4 = 237 which is Neptunium

alpha particle

Answer 1 sheet of paper

gamma ray

Answer 2 block of lead

beta particle

Answer 3 sheet of aluminum

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.