Atomic Absorption Process

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Presentation transcript:

Atomic Absorption Process A neutral atom in the gaseous state can absorb radiation and transfer an electron to an excited state. Simple electronic transitions possible with no vibrational and rotational energy levels possible. Bandwidth much narrower! Occur at discreet l Na(g) 3s ® 3p and 3p ® 5s as well as other transitions are possible at the correct photon energy a transition. Chapter 8&9 - 1

Atomic Absorption Transitions Chapter 8&9 - 2

Na Ba Atomic Emission After Excitation in a Flame Different atoms give rise to characteristic colours that can be used to identify the elements present Ba Na

Atomic Emission Spectra Mercury (Hg) Neon (Ne)