AnaChem Quiz 1 PDF

**I. Identification:** Identify the correct term or phrase that matches the given definition or description. Write your responses in the space provided below. \_\_\_\_\_\_\_\_\_\_\_\_1. A technique used to study the interaction of light with atoms to determine their structure and composition. \_\_...

**I. Identification:** Identify the correct term or phrase that matches the given definition or description. Write your responses in the space provided below. \_\_\_\_\_\_\_\_\_\_\_\_1. A technique used to study the interaction of light with atoms to determine their structure and composition. \_\_\_\_\_\_\_\_\_\_\_\_2. What is called when the atom will eventually return to a lower energy state and it will release the energy it absorbed in the form of electromagnetic radiation (light)? \_\_\_\_\_\_\_\_\_\_\_\_3. It is the process wherein the energy absorbed causes electrons to move from a lower energy state to a higher energy state. \_\_\_\_\_\_\_\_\_\_\_\_4. The wavelengths of light absorbed or emitted by an atom form line spectra, which are unique to each element. These spectra are often referred to as the \"\_\_\_\_\_\_\_\_\_\_\" of elements. \_\_\_\_\_\_\_\_\_\_\_\_5. These isolates specific wavelengths of light associated with the element of interest. **II. True/False**: Indicate whether the statement is true or false. Write **TRUE** on the space provided if the statement is true and **FALSE** if otherwise. \_\_\_\_\_\_\_\_\_\_\_\_1. Atoms in their ground state have the highest energy level. \_\_\_\_\_\_\_\_\_\_\_\_2. Atomic Emission Spectroscopy (AES) requires an external light source. \_\_\_\_\_\_\_\_\_\_\_\_3. ICP-MS combines the high sensitivity of mass spectrometry with the ability of ICP to generate a highly energetic, stable plasma for atomization. \_\_\_\_\_\_\_\_\_\_\_\_4. Atomic spectroscopy can be used to monitor manufacturing processes. \_\_\_\_\_\_\_\_\_\_\_\_5. Photomultiplier tubes (PMTs) are commonly used detectors in atomic spectroscopy. \_\_\_\_\_\_\_\_\_\_\_\_6. Atomic spectroscopy is not useful in detecting fraud in foods. \_\_\_\_\_\_\_\_\_\_\_\_7. Atomic spectroscopy offers high sensitivity, precision, and reliability in detecting and quantifying elements. \_\_\_\_\_\_\_\_\_\_\_\_8. Atomic Absorption are used to detect heavy metals and other pollutants in soil samples, which is crucial for assessing environmental pollution levels and the potential impacts on agriculture and ecosystems. \_\_\_\_\_\_\_\_\_\_\_\_9. AES requires a specific light source, such as HCLs, to excite the atoms and generate fluorescent light. \_\_\_\_\_\_\_\_\_\_\_\_10. Photomultiplier tubes (PMTs) and charge-coupled devices (CCDs) are commonly used detectors, converting light into an electrical signal proportional to its intensity. **III. Multiple Choice.** Select the best answer of each question. Write your answer before each number. Capital letters only. \_\_\_\_\_1. Which component of a spectrometer converts light into an electrical signal? A. Monochromator B. Light Source C. Detector D. Sample Introduction System \_\_\_\_\_2. Which type of atomic spectroscopy measures the absorption of light by free atoms in the gaseous phase? A. Inductively Coupled Plasma Mass Spectrometry (ICP-MS) B. Atomic Emission Spectroscopy (AES) C. Atomic Absorption Spectroscopy (AAS) D. None of the above \_\_\_\_\_3. Which spectroscopy method is often used for trace element analysis? A. Atomic Absorption Spectroscopy (AAS) B. Atomic Emission Spectroscopy (AES) C. Inductively Coupled Plasma Mass Spectrometry (ICP-MS) D. None of the above \_\_\_\_\_4. Which spectroscopy method uses a high-temperature flame, plasma, or electric arc to excite the sample? A. Atomic Absorption Spectroscopy (AAS) B. Inductively Coupled Plasma Mass Spectrometry (ICP-MS) C. Atomic Emission Spectroscopy (AES) D. None of the above \_\_\_\_\_5. Responsible for heating the sample and exciting atoms directly? A. Nebulizers and atomizers B. flame or plasma C. Burners or plasma D. Diffraction gratings or prisms \_\_\_\_\_6. Spectroscopy method is used for contamination and adulteration screening in food safety. A. Atomic Absorption Spectroscopy (AAS) B. Atomic Emission Spectroscopy (AES) C. Inductively Coupled Plasma Mass Spectrometry (ICP-MS) D. None of the above \_\_\_\_\_7. Used in the monochromator to separate the emitted or absorbed light into its constituent wavelengths. A. Diffraction gratings or prisms B. Nebulizers and atomizers C. flame or plasma D. Burners or plasma \_\_\_\_\_8. Common in AAS and AFS, converting liquid samples into fine droplets or an atomic vapor. A. Diffraction gratings or prisms B. Nebulizers and atomizers C. flame or plasma D. Burners or plasma \_\_\_\_\_9. What happens when atoms are exposed to light or absorbs energy? A. Electrons move to a lower energy state B. Electrons move to a higher energy state C. The atom becomes stable D. The atom emits light \_\_\_\_\_10. The wavelengths of light absorbed or emitted by an atom form \_\_\_\_\_\_\_\_\_\_\_\_. A. line spectra B. Dark lines C. Bright lines D. emission lines **Answer Key:** **I. Identification** 1\. Atomic Spectroscopy 2\. Emission 3\. Absorption 4\. fingerprints 5\. Monochromator **II. True/False** 1\. FALSE 2\. FALSE 3\. TRUE 4\. TRUE 5\. TRUE 6\. FALSE 7\. TRUE 8\. FALSE 9\. FALSE 10\. TRUE III. 1\. C 2\. C 3\. C 4\. C 5\. C 6\. A 7\. A 8\. B 9\. B 10\. A