Electromagnetic Radiation & Atomic spectra

Question 1

When energy is transferred to atoms

Answer 1

Electrons within the Atoms can be promoted to higher energy levels

Question 2

When an

Excited electron moves from higher to lower energy level

Answer 2

Atom emits a photon of light energy

Question 3

WHat provides the evidence for

The existence of energy levels

Answer 3

Light energy emitted by an atom produces a spectrum made up of a series of discreteenergy levls

Question 4

What does

Each element produce

When energy is absorbed and emitted

Answer 4

A characteristic absorbtion and emission spectra

These can identify an elemnt

Question 5

Absorption Spectroscopy

Answer 5

Electromagnetic radiation is directed at an atomised sample, the radiation is absorbed as electrons are promoted to higher levels

Question 6

How is an

Absorption Spectrum produced

Answer 6

By measuring how the intensity of light varies with wavelength

Question 7

Emission Spectroscopy

Answer 7

High Temperatures are used to excite electrons within atoms, as they drop back down photons are emitted

Question 8

Emission Spectrum

Answer 8

Produced by intesnity of light emitted by different wavelengths

Question 9

What happens in

Atomic spectroscopy

Answer 9

Concentration of an element is related to the intensity of light emitted or absorbed