Thin layers of potassium (work function W = 3.68 × 10-19 J) and sodium (W= 4.41 x 1019 J) are exposed to radiation of wavelength 300 nm (show all calculations). a. Which metal emits electrons with the greater velocity? Circle POTASSIUM or SODIUM b. What is the velocity of these electrons? (show all work) Potassium: Sodium:

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Introduction to chemistry

Chemistry is a branch of science that deals with the analysis of material and the substances that comprise it. It also manages the properties of these substances and their reactions to form new substances. It is basically centered on particles and atoms that make up components and mixtures. These chemical species will in general connect using bonds.