MC RW (wk 16)

c) energy increases or decreases

Directly proportional: energy and frequency Inversely proportional: frequency and wavelength wavelength and energy

violet indigo blue green yellow orange red In the visible spectrum, red light has the longest wavelength, but the lowest frequency and lowest energy. Violet light has the shortest wavelength, but the highest frequency and highest energy. Keep in mind that all colors of light travel at the same speed, 3.0×108 m/s

?largest? gamma rays visible light microwaves radio waves ?smallest?

microwaves, radio waves

?largest? gamma rays visible microwaves ?smallest? higher frequency = higher energy per photon

?largest? gamma rays visible microwaves ?smallest?

?largest? microwaves visible gamma rays ?smallest? In order of increasing frequency and decreasing wavelength these are: radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays.

a) 5 seconds * 3.00 × 10^8 = 1500000000 = 1.5 × 10^9 b) 9 days = 86400 * 9 = 777600 seconds in 9 days 777600 * 3.00 × 10^8 = 2.3 × 10^14 c) 6 years = 1.892 × 10^8 1.892 × 10^8 * 3.00 × 10^8 = 5.7 × 10^16

ultraviolet

2,8,18,32

2,6,10,14 An electron in an atom can be raised to a higher energy level by absorbing energy. If the electron falls to a lower energy level, it releases the energy in the form of electromagnetic radiation.

In order of decreasing wavelength: Radio Waves Microwaves Infrared light Red light Violet light Ultraviolet light X-rays Gamma rays Explanation: The electromagnetic spectrum is a classification of all the electromagnetic waves depending on their wavelength and their frequency. The waves with longest wavelength are radio waves, which have wavelenght that spans from a few mm up to several km. The waves with shortes wavelength are gamma rays, which have wavelength shorter than 10 picometers. More or less at the centre of the electromagnetic spectrum light the visible part of the spectrum, which is usually classified into 7 colors: red, orange, yellow, green, blue, indigo and violet (decreasing wavelength). Red light is the color with longer wavelenght (approx. 750 nanometers), while violet light has the shortest wavelength (approx. 380 nanometers).

lower energy orbitals fill before higher energy orbitals.

one electron goes into each until all of them are half full before pairing up.

no two electrons can be identified by the same set of quantum numbers (i.e. must have different spins).