Bond vibration frequencies are directly related to:
A. The amount of atoms in a compound
B. The electronegativity of the atoms
C. The amount of sample on the IR plate
D. Mass of the atoms
E. All of the Above
To determine the correct answer, we need to understand the factors that affect bond vibration frequencies.
Bond vibration frequencies are primarily influenced by the masses of the atoms involved and the strength of the bond, which is related to the bond's bond order. The bond vibration frequency increases with lower atom masses and weaker bond strengths.
Let's evaluate each option:
A. The amount of atoms in a compound: The number of atoms in a compound does not directly affect the bond vibration frequencies. Therefore, option A is not correct.
B. The electronegativity of the atoms: Electronegativity is a measure of an atom's ability to attract electrons towards itself in a chemical bond. While it influences the strength of the bond to some extent, it does not directly determine bond vibration frequencies. Hence, option B is not correct.
C. The amount of sample on the IR plate: The amount of sample on the infrared (IR) plate does not affect bond vibration frequencies. It may impact the intensity of the signal obtained in infrared spectroscopy but not the frequencies itself. Thus, option C is not correct.
D. Mass of the atoms: As mentioned earlier, the mass of the atoms involved in a chemical bond directly influences the bond vibration frequencies. Lighter atoms vibrate at higher frequencies compared to heavier atoms. So, option D is correct.
Since only option D is correct, the answer is D. Mass of the atoms.