1.5 spectroscopy AAS mrs M stage 2 chem

What is the primary principle behind atomic spectroscopy?

• The interaction of light with molecules

• The interaction of light with atoms

• The interaction of light with ions

• The interaction of light with solids

Which of the following best describes an emission spectrum?

• A spectrum that shows all wavelengths of light

• A spectrum that shows only absorbed wavelengths

• A spectrum that shows only emitted wavelengths

• A spectrum that shows no wavelengths

In atomic absorption spectroscopy, what is measured to determine the concentration of an element?

• The intensity of emitted light

• The intensity of absorbed light

• The wavelength of emitted light

• The wavelength of absorbed light

Which of the following is a common application of atomic spectroscopy in chemical analysis?

• Determining the molecular structure of a compound

• Identifying the presence of specific elements in a sample

• Measuring the pH of a solution

• Calculating the boiling point of a liquid

Which of the following is true about the absorption spectrum?

• It consists of a continuous range of colours

• It consists of dark lines or bands on a bright background

• It consists of bright lines on a dark background

• It is identical to the emission spectrum

What is the role of a monochromator in atomic spectroscopy?

• To increase the intensity of light

• To separate light into its component wavelengths

• To detect the presence of ions

• To convert light into electrical signals

Which of the following elements is commonly analysed using atomic absorption spectroscopy?

• Helium

• Sodium

• Neon

• Argon

In quantitative analysis using atomic spectroscopy, what is typically plotted on the y-axis of a calibration curve?

• Wavelength

• Absorbance or emission intensity

• Concentration

• Time

What is the main advantage of using atomic emission spectroscopy over atomic absorption spectroscopy?

• It requires less sample preparation

• It is more sensitive to low concentrations

• It can analyse more elements simultaneously

• It is less expensive

Which of the following is a common source of light in atomic absorption spectroscopy?

• Tungsten lamp

• Deuterium lamp

• Hollow cathode lamp

• LED light