22. What is the frequency of visible light with a wavelength of 400nm? c 299,792

Question

22. What is the frequency of visible light with a wavelength of 400nm? c 299,792.000 mvs 23. Is this light violet, green, yellow, or red? 24. What has a longer wavelength visible light or microwave light? 25. What has a higher frequency gamma rays or UV ight? 26. The yellow light given off by a sodium vapor lamp used for public lighting has a wavelength of 589 nm What is the frequency of this radiation? 26. Use Plank's constant to calculate the energy of a single photon inside a microwave oven with a wavelength of 2. on. h = 6.626 x 10-34Ms. 27. Which element is more electronegative. Oxygen or Boron? 28. Which pair of elements would make the most ionic bond? Sodium and Chlorine Carbon and Hydrogen Carbon and Oxygen Chlorine and Oxygen Chlorine and Chlorine Which pair of elements would make the most covalent bond? Lithium and Carbon Potassium and Bromine Carbon and Nitrogen Oxygen and Oxygen Silicon and Oxygen There may bo more or dferent queasins depend Monday wil be review with no new material so please come with questions! Virtually all the questions are solved in the notes so please consult the slides to work through your answers.

Explanation / Answer

Answer for 22

frequency = wavelength / velocity of light

= 400 * 10-9m / 0.299792000 * 109  ms-1

= 1334 * 10 -18 s-1

= 1.3 * 10 -21 s-1

Answer for 23

This light is violet.

visible range is from 700nm to 400nm

Red is with highest wavelength i.e.700nm and violet is with 400nm.

Yellow is in middle with 550nm.

Answer for 24

Microwave has the longer wavelength.

Answer for 25

Gamma rays has higher frequency.

Answer for 26

Frequency of sodium vapour lanm= 589 nm / 3 *108 ms-1

= 1.96 * 10 -19 s-1

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