Question : 41) The half-life of bromine-74 25 min. How much of : 1362907

 

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

A) 0.50 mg

B) 1.0 mg

C) 2.0 mg

D) 0.25 mg

E) 4.0 mg

42) 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 

A) fission.

B) fusion.

C) decomposition.

D) chain reaction.

E) ionization.

43) In the sun, nuclei of hydrogen combine to form a larger nucleus and release a great amount of energy.  The process is known as 

A) fission.

B) fusion.

C) metathesis.

D) chain reaction.

E) ionization.

44) When a positron is emitted from the nucleus of an atom, the nuclear mass

A) increases by two units.

B) decreases by one unit.

C) increases by one unit.

D) decreases by two units.

E) remains the same.

45) When an alpha particle is emitted from the nucleus of an atom, the nuclear mass

A) increases by two units.

B) decreases by four units.

C) increases by one unit.

D) decreases by two units.

E) remains the same.

46) When a gamma ray is emitted from the nucleus of an atom, the nuclear mass

A) increases by two units.

B) decreases by one unit.

C) increases by one unit.

D) decreases by two units.

E) remains the same.

47) Gamma rays may be detected using

A) a Geiger counter.

B) a film badge.

C) X-ray film.

D) all of the above devices.

E) none of the above devices.

48) Gamma rays require the heaviest shielding of all the common types of nuclear radiation because gamma rays have the 

A) highest energy.

B) most intense color.

C) lowest energy.

D) largest particles.

E) heaviest particles.

49) If absorbed internally, alpha particle emitters are the most damaging because alpha particles

A) have the largest charge.

B) have the greatest energy.

C) have the greatest mass.

D) consist of high energy electrons.

E) consist of pure energy.

50) Radium-226 decays by alpha emission to

A) barium-131.

B) cobalt-60.

C) carbon-14.

D) polonium-218.

E) radon-222.

51) Iodine-131 decays by beta emission to

A) iodine-132.

B) tellurium-131.

C) iodine-130

D) bromine-131

E) xenon-131.

52) A sample of cerium-141 for a diagnostic test was dissolved in saline solution to an activity of 4.5 millicuries/mL. If the patient undergoing the test needs a dose of 10 millicuries, how much of the solution should be injected into the patient?

A) 45 mL

B) 0.45 mL

C) 2.2 mL

D) 22 mL

E) 4.5 mL

53) The most widely used medical isotope in nuclear medicine is

A) Tc-99m.

B) I-131.

C) P-32.

D) I-125.

E) Co-60.

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

A) 230 millicuries

B) 0.23 millicuries

C) 0.076 millicuries

D) 760 millicuries

E) 13.8 millicuries

55) One symptom of mild radiation sickness is

A) a lowered white cell count.

B) a raised white cell count.

C) a lowered red blood cell count.

D) a raised red blood cell count.

E) a white cell count of zero.

 

 

Place your order
(550 words)

Approximate price: $22

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
$26
The price is based on these factors:
Academic level
Number of pages
Urgency
Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read more

Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read more

Privacy policy

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read more

Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more