🔥Spectras

Question 1

Light of all visible wavelengths?

Answer 1

White light

Question 2

Briefly describe emission spectra

Answer 2

• atoms given energy by heating/electrical field
• electrons jump to a higher energy level
• when source of energy is removed they drop down a level and release a photon of energy
• this value corresponds to the electromagnetic radiation of a specific frequency

Question 3

What does the photo correspond to in the emissions spectra

Answer 3

The electromagnetic radiation of a specific frequency

Question 4

What colour is emission spectra

Answer 4

Black with coloured lines

Question 5

Describe the absorption spectra

Answer 5

• white light is passed through an elements gaseous atoms
• certain wavelengths of light are absorbed as all atoms absorb different wavelengths of light
• wavelength corresponds to the energy taken in by atoms to prompt electrons to a higher energy level

Question 6

What does the wavelength of light correspond to In the absorption spectra

Answer 6

The energy taken in by atoms to promote electrons to higher energy level

Question 7

What colour is absorption spectra

Answer 7

Spectra of white light with black lines (formed from where wavelength had been absorbed)

Question 8

What shell do lines in the Lyman series run to

What region is the Lyman region

Answer 8

N=1

ultraviolet region

Question 9

What shell do lines in the balmer series run to

What region is the balmer region

Answer 9

N=2

Visible region

Question 10

Describe the hydrogen spectra

Answer 10

1) atom is excited and absorbs energy causing electron to jump to a higher energy level
2) source removed, electron falls back down and releases a photon of energy in the form of electromagnetic radiation
3) emitted energy is seen as a line in the spectrum
4) E=hf, therefore transitions between different energy levels result in emission of radiation of different frequencies, balmer/lymer falls to n=2/1 as electrons return to second/first shell