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Nursing Elites

ATI TEAS 7

Chemistry

1. Which statement accurately describes the electron cloud model of the atom?

Correct answer: B

Rationale: Electrons occupy specific energy levels around the nucleus with varying probabilities. The electron cloud model depicts electrons existing in distinct energy levels, not fixed orbits, with probabilities of finding them in specific regions.

2. Which factor affects the gravitational potential energy of an object the most?

Correct answer: B

Rationale: Gravitational potential energy is directly proportional to the height or distance from the ground. As the object is raised higher, its gravitational potential energy increases. The mass of the object affects the gravitational potential energy, but the distance from the ground has a greater impact on it. The gravitational force and the shape of the object do not directly affect the gravitational potential energy.

3. When ice melts, it undergoes a…

Correct answer: B

Rationale: Melting is a change in physical state, not a change in the chemical composition of the ice.

4. How does the acceleration of an object change if the force acting on it is doubled?

Correct answer: b

Rationale: According to Newton's second law (F = ma), if force is doubled and mass remains constant, acceleration doubles.

5. Which term describes the ability of a muscle to return to its original length and shape after being stretched or contracted?

Correct answer: b

Rationale: The correct answer is B: "Elasticity." Elasticity is the term that describes the ability of a muscle to return to its original length and shape after being stretched or contracted. Contractility refers to the muscle's ability to contract forcefully, extensibility is the ability of a muscle to be stretched without being damaged, and excitability is the ability of a muscle to respond to stimuli. In this context, elasticity specifically pertains to the muscle's ability to bounce back to its original form, making it the most appropriate term in relation to the question.

6. What property of a substance refers to its ability to be drawn into thin wires without breaking?

Correct answer: c

Rationale: Ductility is the property that describes a substance's ability to be drawn into thin wires without breaking.

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