ATI TEAS 7
Chemistry
1. What is the difference between alpha decay and beta decay?
- A. Both release the same type of particle.
- B. Alpha decay releases a helium nucleus, while beta decay releases an electron or positron.
- C. Alpha decay is more common than beta decay.
- D. They both convert one element into another, but in different ways.
Correct answer: B
Rationale: Alpha decay releases a helium nucleus (2 protons, 2 neutrons), while beta decay releases an electron or positron. - Both processes alter the atomic structure and change the element's identity.
2. Which property of a substance describes its ability to conduct heat or electricity?
- A. Reactivity
- B. Conductivity
- C. Density
- D. Viscosity
Correct answer: b
Rationale: Conductivity refers to a substance's ability to conduct heat or electricity
3. A guitar string vibrates at a fundamental frequency of 440 Hz. What is the frequency of the second harmonic (first overtone)?
- A. 220 Hz
- B. 440 Hz
- C. 880 Hz
- D. 1760 Hz
Correct answer: C
Rationale: Harmonics have frequencies that are multiples of the fundamental frequency. The second harmonic has a frequency twice the fundamental, so it's 440 Hz * 2 = 880 Hz.
4. The K-capture process, a type of electron capture, involves the capture of an electron from which electron shell:
- A. The outermost s-orbital
- B. An inner p-orbital
- C. An inner d-orbital
- D. Any available electron shell
Correct answer: A
Rationale: The K-capture process involves the capture of an electron from the innermost electron shell, known as the K-shell. The K-shell is represented by the outermost s-orbital in an atom's electron configuration. When an electron from the K-shell is captured, it results in the transition of a proton to a neutron in the nucleus, thereby changing the atomic number of the element. Therefore, option A, 'The outermost s-orbital,' is the correct answer as it accurately describes the electron shell involved in the K-capture process.
5. Salts are formed by the reaction between:
- A. Two acids
- B. An acid and a base
- C. Two bases
- D. A metal and a nonmetal only
Correct answer: B
Rationale: Salts are ionic compounds formed by the reaction of an acid and a base
6. A patient weighs 180 pounds. What is their weight in kilograms (1kg = 2.2lbs)?
- A. 68kg
- B. 75kg
- C. 82kg
- D. 90kg
Correct answer: C
Rationale: Divide the weight in pounds (180) by the conversion factor (2.2lbs/kg).
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