Nursing Elites

1. A radioactive isotope has a half-life of 20 years. How many grams of a 6-gram sample will remain after 40 years?

• A. 8
• B. 6
• C. 3
• D. 1.5

Correct answer: C

Rationale: The half-life of a radioactive isotope is the time it takes for half of the original sample to decay. After each half-life period, half of the initial sample remains. In this case, after the first 20 years, half of the 6-gram sample (3 grams) will remain. After another 20 years (total of 40 years), half of the remaining 3 grams will remain, which is 1.5 grams. Therefore, 3 grams will be left after 40 years. Choice A is incorrect as it doesn't consider the concept of half-life and incorrectly suggests an increase in the sample. Choice B is incorrect as it assumes no decay over time. Choice D is incorrect as it miscalculates the remaining amount after two half-life periods.

2. Which substance would be most affected by a change in temperature?

• A. Liquid nitrogen
• B. Salt crystals
• C. Hydrogen gas
• D. Iron filings

Correct answer: C

Rationale: Hydrogen gas would be most affected by a change in temperature because gases have a greater expansion or contraction in volume with changes in temperature compared to liquids or solids. When the temperature of hydrogen gas increases, its molecules gain kinetic energy and move faster, causing the gas to expand and its volume to increase. Conversely, when the temperature decreases, the gas molecules lose kinetic energy and move slower, leading to a decrease in volume. This property makes hydrogen gas highly sensitive to temperature changes compared to liquid nitrogen, salt crystals, or iron filings. Liquid nitrogen, salt crystals, and iron filings are less affected by temperature changes because their particles are closer together and have lower kinetic energy, resulting in minimal volume changes with temperature fluctuations.

3. Which is the best title for this passage?

• A. “Medical Treatment for Gout”
• B. “Uric Acid Affects the Joints”
• C. “Risk Factors for One Type of Arthritis”
• D. “Nurse-Led Care Aids Gout Patients”

Correct answer: D

Rationale: The passage focuses on how nurse-led care, including holistic education and lifestyle advice, can aid patients with gout.

4. What would be an appropriate nursing response when a mother reports that her 16-month-old toddler has an earache?

• A. Maybe the toddler is just teething.
• B. I will check her ear for an ear infection.
• C. Are you sure the toddler is really in pain?
• D. Please describe what the toddler is doing to indicate she is in pain.

Correct answer: B

Rationale: The appropriate nursing response would be to assess the toddler's ear to determine if there is indeed an ear infection causing the earache. It is crucial to provide timely and suitable care for the child's pain and discomfort. Checking for an ear infection is a necessary step in evaluating the source of the toddler's earache. Choice A is incorrect as it assumes the earache is due to teething without proper assessment. Choice C questions the mother's report rather than focusing on the child's condition. Choice D is not as direct and focused as directly examining the ear for a possible infection.

5. Which word is used incorrectly in the following sentence? Everybody pretends to do so, but few truly understand the essay.

• A. pretends
• B. truly
• C. understand
• D. essay

Correct answer: C

Rationale: The word 'understand' should be used instead of 'understands' to maintain subject-verb agreement. In this sentence, 'few' is a plural subject, requiring the plural verb 'understand' rather than 'understands.' The corrected sentence reads, 'but few truly understand the essay.' Choice A, 'pretends,' is used correctly in the sentence. Choice B, 'truly,' is also used appropriately. Choice D, 'essay,' is also correctly used in the sentence.

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