A Metal Having a Work Function of 2

question 26

Multiple Choice

A metal having a work function of 2.4 eV is illuminated with monochromatic light whose photon energy is 4.0 eV.What is the maximum kinetic energy of the photoelectrons produced by this light? (h = 6.626 × 10^-34 J • s,1 eV = 1.60 × 10^-19 J)

• A) 2.6 × 10^-19 J
• B) 3.8 × 10^-19 J
• C) 4.7 × 10^-19 J
• D) 5.5 × 10^-19 J
• E) 6.4 × 10^-19 J

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Definitions:

Cotransported

The process by which two or more substances are simultaneously transported across a cell membrane by a single carrier protein.

Sodium and Chloride

Essential electrolytes in the body that help maintain fluid balance, nerve transmission, and muscle function.

Potassium Ions

Positively charged ions of potassium, vital for cellular functions, particularly in nerve impulse transmission and muscle contraction.

Active Transport

The movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy in the form of ATP.