unit 1a: atomic spectra

Question 1

electrons can be promoted to higher energy levels when

Answer 1

energy is transferred to the atom

Question 2

when an excited electron moves from a higher energy level to a lower energy level

Answer 2

the atom emits a photon of light energy

Question 3

types of atomic spectra

Answer 3

absorption spectra, emission spectra

Question 4

elements and spectra

Answer 4

each element has its own characteristic spectra which can be used to identify and quantify it

Question 5

higher temperatures are used to

Answer 5

excited the electrons within atoms e.g. flame test

Question 6

emission spectra

Answer 6

coloured lines on a dark background

Question 7

an emission spectra is produced by

Answer 7

measuring the intensity of light emitted at different wavelengths

Question 8

absorption spectra

Answer 8

dark lines on a coloured background

Question 9

an absorption spectrum is produced by

Answer 9

measuring how the intensity of absorbed light varies with wavelength

Question 10

absorption spectroscopy

Answer 10

sample is atomised using a flame or electricity and electromagnetic radiation is attracted to it, which is absorbed promoting electrons to higher energy levels

Question 11

concentration of an element within a sample

Answer 11

related to the intensity of light emitted or absorbed