Structure 1.3 Electronic configuration

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Define the electromagnetic spectrum

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The electromagnetic spectrum (EMS) is a spectrum of wavelengths that comprise the various types of electromagnetic radiation

  • It is arranged from increasing energy and frequency but a decrease in wavelength

    Includes :

  • Gamma

  • X-rays

  • Ultra violet

  • Infrared

  • Microwaves

  • Radiowaves

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What is the difference between emission line spectrum and continuous line spectrum?

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  • A continuous spectrum in the visible region contains all the colours of the spectrum

  • However, a line spectrum only shows certain frequencies

  • This tells us that the emitted light from atoms can only be certain fixed frequencies - it is quantised (quanta means 'little packet')

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Structure 1.3.1 Structure 1.3.2 Structure 1.3.3 Structure 1.3.4 Structure 1.3.5 Structure 1.3.6 Structure 1.3.7

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10 Terms

1
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Define the electromagnetic spectrum

The electromagnetic spectrum (EMS) is a spectrum of wavelengths that comprise the various types of electromagnetic radiation

  • It is arranged from increasing energy and frequency but a decrease in wavelength

    Includes :

  • Gamma

  • X-rays

  • Ultra violet

  • Infrared

  • Microwaves

  • Radiowaves

2
New cards

What is the difference between emission line spectrum and continuous line spectrum?

  • A continuous spectrum in the visible region contains all the colours of the spectrum

  • However, a line spectrum only shows certain frequencies

  • This tells us that the emitted light from atoms can only be certain fixed frequencies - it is quantised (quanta means 'little packet')

3
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Describe the continous spectrum

contains light of all wavelengths and appears as a continous series of colors with no gaps visible with wavelength ranging from 400nm to 700nm

4
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Describe the emission spectrum

a series of line against a dark background are produced when when a gaseous element is subjected to high voltage under reduced pressure. This is due to electrons that were promoted to a higher energy level fall back to a lower energy level which results in photon emission.

5
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Describe the absorption spectrum

A series of dark lines within a continous spectrum.

6
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What is a photon?

a quantum of energy

7
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Describe the principle behind flame tests

Atomic emission
Electrons are promoted to a higher energy level by the heat of the flame, when they fall back to a lower energy level, photons of certain wavelengths are emitted some of which are in the visible region of the spectrum.

8
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Describe the relationships between
→ E ∝ 1/λ
c = fλ

The energy of the radiation is inversely proportional to the wavelength

speed of light= frequency x wavelength

9
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What is Quantization?

the idea that electromagnetic radiation comes in discrete packets or quanta.

[each line in the emission spectrum of an element has a specific wavelength which corresponds to a specific amount of energy]

10
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