Question

Dry Lab 3 Atomic and Molecular structure Metallic cations heated to high temperatures produce characterisse oppear in the torbursts To view and calibrate visible line s To identify an element from its visible line To identify a from infrared spectrum To pred three-dimensional structure of molecules and molecular ions OBJECTIVES vaNe light, as we know it, is responsible for the colors of nature-blue skies, green NTRODUCTION red roses, orange-red rocks, and brown deer. Our eyes are distin- push the and the intensities of those colors through a complex naturally ned detection system- our The beauty of nature is a result of the interaction sunlight with matter. Since all matter consists of atoms and molecules, it is obwious that sunlight, in some way, interacts with them to produce nature's col Within molecules of compounds are electrons, vibrating bonds, and rotating atoms, all of which can absorb energy. Because every compound is different, every mokcule of a given compound possesses its own unique set of and rotational enerzy states, which are said to be When incident electro- Energy olaule magnetic (EM) radiation falls on a the radiation san energy equal to the difference between two energy stales, placing the mole- quantized amounts of energy ule in an excited state. The remainder of the EM radiation passes through the lecule unaffected except there Quantized only a definien amount Atoms of elements interact with EM radiation in much the same way, ire no bonds to vibrate or atoms to rotate. Only electronic energy states are available for energy absorption light, and light has wavelengths and frequencies. wavelength the disonce between relationship energy as and its wo of wave between the e Frequency: the number of crests expressed by the equations: pass a given point per second Planck's constant, 6.63 x 10-30 J.sphoton: c equals the velocity of the EM hronounced "new" frequency in the visible region (400 to EM radiation includes only the wavelengths of X-ray regions) and nm) but also those that are shorter (e.g., the ultraviolet and D3.1 ner (e.g., microwave, and radio wave regio has higher energy. Page 162. the infrared, h visible region of the rom Equation D3.1, wavelengt from the energy atom or molecule absorbs EM lower to a higher mn exc led from a Lab 3 161

Answer 1

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