ATI TEAS 7
Chemistry
1. Which statement accurately describes the periodic trends in atomic radius?
- A. Increases down a group and decreases across a period
- B. Decreases down a group and increases across a period
- C. Remains constant throughout the table
- D. Fluctuates unpredictably based on individual elements
Correct answer: A
Rationale: Moving down a group, additional electron shells increase the distance from the nucleus, leading to larger atomic radii. Moving across a period, the number of electron shells remains constant, but the increasing nuclear charge pulls electrons closer, resulting in smaller radii.
2. She plans of assigning competent people to fill the roles designed in the hierarchy. Which
- A. Staffing
- B. Scheduling
- C. Recruitment
- D. Induction
Correct answer: B
Rationale: The correct answer is B: Scheduling. Scheduling involves assigning people to specific tasks or roles within an organization based on the hierarchy and operational needs. In this scenario, the focus is on assigning competent individuals to fill the roles outlined in the hierarchy, which aligns with the concept of scheduling. Staffing refers to the overall process of acquiring, deploying, and retaining a workforce; recruitment specifically pertains to attracting and selecting candidates for job roles; and induction involves the orientation and integration of new employees into the organization. Therefore, the most relevant term in this context is scheduling.
3. What property of a substance remains constant regardless of changes in its shape or size?
- A. Mass
- B. Weight
- C. Density
- D. Volume
Correct answer: a
Rationale: Mass remains constant regardless of changes in an object's shape or size.
4. Stephanie is often seen interacting with the medical intern during coffee breaks and after duty
- A. Formal
- B. Informal
- C. Staff
- D. Line
Correct answer: B
Rationale: The correct answer is 'B: Informal.' Stephanie's interactions with the medical intern during coffee breaks and after duty suggest a casual and friendly relationship, rather than a formal or official one. 'Informal' describes interactions that are relaxed, personal, and not bound by strict professional protocols. In contrast, 'formal' interactions would involve more structured and official communication, such as meetings or professional discussions. 'Staff' and 'line' are not relevant in this context, as they do not describe the nature of the relationship between Stephanie and the medical intern.
5. What is the main verb tense in the following sentence? "She had already left before I arrived."
- A. Present tense
- B. Past tense
- C. Future tense
- D. t perfect tense
Correct answer: D
Rationale: The verb "had left" is in the past perfect tense, indicating an action completed before another past action ("arrived").
6. During a healthy heartbeat, the P wave on an ECG represents
- A. The repolarization of the ventricles.
- B. The electrical conduction through the AV node.
- C. The contraction phase of the ventricles (systole)
- D. The depolarization of the atria.
Correct answer: D
Rationale: The correct answer is D: The P wave on an ECG represents the depolarization of the atria. During a healthy heartbeat, the P wave is the first positive deflection seen on the ECG and reflects the initiation of the electrical impulse in the atria, leading to atrial contraction. It is followed by the QRS complex, which represents the depolarization of the ventricles. Options A, B, and C are incorrect because the P wave specifically corresponds to atrial depolarization, not repolarization of the ventricles, electrical conduction through the AV node, or ventricular contraction. Understanding the sequence of electrical events in the heart as represented on an ECG is crucial for interpreting cardiac function and identifying potential abnormalities.
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