Nursing Elites

1. Why are noble gas elements generally unreactive?

• A. They are too large and cannot form bonds easily.
• B. They lack valence electrons in their outermost shell.
• C. They have strong bonds within their own molecules.
• D. They have already achieved stable electron configurations.

Correct answer: D

Rationale: The correct answer is D. Noble gas elements are generally unreactive because they have already achieved stable electron configurations by having a full outer electron shell. This full shell makes them very stable and unlikely to gain, lose, or share electrons with other elements. Choices A, B, and C are incorrect because noble gases are not unreactive due to being too large to form bonds easily (A), lacking valence electrons in their outermost shell (B), or having strong bonds within their own molecules (C).

2. The control center of the cell, containing genetic information (DNA), is the:

• A. Golgi apparatus
• B. Ribosome
• C. Nucleus
• D. Endoplasmic reticulum

Correct answer: C

Rationale: The correct answer is C, the nucleus. The nucleus is the control center of the cell and houses the genetic information in the form of DNA. The Golgi apparatus (choice A) is responsible for packaging and processing proteins, the ribosome (choice B) is involved in protein synthesis, and the endoplasmic reticulum (choice D) is involved in protein and lipid synthesis. Therefore, choices A, B, and D are not the correct answers as they do not house the genetic information or serve as the control center of the cell.

3. The passage describes recent hurricane seasons as the most expensive on record. Which of the following statements gives the implied reason for this increased expense?

• A. Hurricane Katrina was an extremely violent storm.
• B. Valuable buildings were destroyed in New Orleans.
• C. The Atlantic Basin is entering an active period.
• D. Destruction of barrier islands and coastal wetlands has left the mainland exposed.

Correct answer: D

Rationale: The destruction of barrier islands and coastal wetlands has left the mainland exposed, leading to increased damage and expenses from hurricanes. This implies a direct reason for the increased cost of recent hurricane seasons. The other choices do not directly address the reason for the increased expenses. Choice A talks about the intensity of Hurricane Katrina but does not explain the overall trend of increased expenses. Choice B mentions buildings being destroyed, which is a consequence rather than a reason for increased expenses. Choice C discusses an active period in the Atlantic Basin but does not connect it to the increased costs of hurricane seasons.

4. Which of the following best expresses the meaning of "intelligence (instinct)" in the context of this passage?

• A. Instinct is synonymous with intelligence in the passage.
• B. Intelligence and instinct are not clearly distinct in the context.
• C. Instinct is a natural ability to perform actions without learned behavior.
• D. Instinct refers to an animal's natural survival mechanism.

Correct answer: A

Rationale: Instinct refers to natural, unlearned behaviors, particularly in survival and reproduction.

5. What type of bond is present in salt?

• A. Ionic
• B. Nonpolar covalent
• C. Polar covalent
• D. Peptide

Correct answer: A

Rationale: The correct answer is 'Ionic.' Ionic bonds are formed in salts through the transfer of electrons between atoms, leading to the attraction between positively and negatively charged ions. This results in a stable ionic compound, such as common table salt (sodium chloride). Nonpolar covalent, polar covalent, and peptide bonds are not typically found in salts. Nonpolar covalent bonds involve the equal sharing of electrons, polar covalent bonds involve unequal sharing of electrons, and peptide bonds are specific to proteins, not salts.

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