Which of the Following Statements Are True of Atomic Emission

question 10

Multiple Choice

Which of the following statements are true of atomic emission spectroscopy (AES) ?
I Atoms are promoted to an excited state with a laser.
II Atoms are promoted to an excited state by gaining energy from collisions with other atoms or from the high thermal energy of the flame.
III The intensity of emitted light is proportional to analyte concentration.
IV Plasma often replaces flame in AES.

• A)III and IV
• B)I,III,and IV
• C)II,III,and IV
• D)II and III
• E)I and III