ATI TEAS 7
Chemistry
1. What is the periodic law?
- A. The statement that the properties of the elements are a periodic function of their atomic numbers.
- B. The statement that the elements can be arranged in a table in which elements with similar properties are grouped together
- C. The statement that the elements can be arranged in a table in which the atomic number of an element is equal to the number of protons in its nucleus
- D. The statement that the elements can be arranged in a table in which the atomic mass of an element is equal to the number of neutrons in its nucleus.
Correct answer: A
Rationale: The periodic law states that the properties of elements are a periodic function of their atomic numbers. This means that when elements are arranged in order of increasing atomic number, there is a periodic repetition of their properties. This forms the basis for the modern periodic table. Option B describes the periodic table itself, while options C and D do not accurately describe the periodic law.
2. What happens to the concentration of hydrogen ions (\([H^+]\)) in a solution as the pH increases?
- A. Increases
- B. Decreases
- C. Remains constant
- D. Becomes neutral
Correct answer: B
Rationale: As the pH increases, the concentration of hydrogen ions decreases. The relationship is inversely proportional
3. The process of a gas changing into a liquid is called:
- A. Evaporation
- B. Boiling
- C. Condensation
- D. Sublimation
Correct answer: C
Rationale: Condensation happens when gas particles lose energy and slow down, transitioning into the liquid state.
4. What is the SI unit of measurement for work?
- A. Newton-meter (N·m)
- B. Joule (J)
- C. Watt (W)
- D. Meter per second (m/s)
Correct answer: b
Rationale: Work is measured in Joules (J) in the SI unit system.
5. What can be inferred about the data collected by smart cities?
- A. It is easily accessible and transparent to the public.
- B. It is solely used for optimizing infrastructure and services.
- C. It may raise privacy concerns for individual citizens.
- D. It is always accurate and free from technical errors.
Correct answer: C
Rationale: The passage specifically mentions concerns about data privacy, implying potential issues for individuals.
6. In meiosis I, how are sister chromatids distinguished from homologous chromosomes?
- A. Sister chromatids share the same centromere, while homologues have different centromeres.
- B. Sister chromatids have identical DNA sequences, while homologues have slightly different sequences due to crossing over.
- C. Sister chromatids repel each other, while homologues attract each other during synapsis.
- D. Sister chromatids separate during anaphase I, while homologues separate during anaphase II.
Correct answer: B
Rationale: While sister chromatids are identical copies of the same chromosome, homologous chromosomes are paired copies, each inherited from one parent. Crossing over during meiosis I can lead to slight differences in their DNA sequences.
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