CHEM 1021 Lecture Notes - Lecture 32: Atomic Nucleus, Photon, Continuous Spectrum
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Review of chapter 2 ideas before we begin chapter 7. Dalto(cid:374)"s ato(cid:373)i(cid:272) theor(cid:455) a(cid:374)d (cid:373)oder(cid:374) ato(cid:373)i(cid:272) theor(cid:455: protons identity of elements, neutrons contributes to mass, electrons chemical reactivity. Discovery of subatomic particles and the nuclear model for an atom. All of the light, uv, (cid:373)i(cid:272)ro(cid:449)a(cid:448)e light, (cid:373)a(cid:374)(cid:455) lights (cid:449)e (cid:272)a(cid:374)"t see, (cid:271)la(cid:272)k a(cid:374)d parti(cid:272)le-like properties. Light has wave and particle like properties: wave-like properties or properties of light. (cid:1005) (cid:374)(cid:373) = (cid:1005) (cid:454) (cid:1005)(cid:1004)^-9 m. Frequency - hertz (hz) or inverse seconds. C = 3. 00 x 10^8 m/s = (cid:448) Clicker 1: calculate the frequency of 632. 8 nm light. = 6(cid:1007)(cid:1006). 8 (cid:374)(cid:373) (632. 8nm)(1m/10^9) = 4. 74 x 10^44 hz (3. 00 x 10^8 m/s)/(632. 8 x 10^-9 m) = (632. 8 x 10^-9 v)/(632. 8 x 10^-9 m) The higher amplitude the brighter the light is. The lower amplitude the dimmer the light is. Electromagnetic radiation can also be thought of as a stream of tiny particles called photons.
