Chapter 3 - The Bohr and Orbital Models

Continuous spectrum

A pattern of wavelength of light produced separate from a source, no gaps between colours and use of white light

Line spectrum

A pattern of wavelength produced from hydrogen gas, separated colour line

Line Emission spectrum

Is the pattern of wavelength of light emitted by a substance

Spectrometer

The instrument used to examine spectra

Heating of metal salts

When metal salts are heated, different colours are emitted depending on the metal present in the salt, eg sodium is yellow colour

Quantisation of energy

Bohr proposed that an electron in an atom can only have a ficed amount of energy

Quantum of energy

Fixed energy of electrons

Energy levels

Electrons have various energy levels, ‘n’ energy level up to six

Energy level

Is defined as the fixed energy value that an electron in an atom may have

Ground state

Is one in which the electrons occupy the lowest available energy levels n=1

Excited state

Is one in which the elctrons occupy higher energy levels than those available in the ground state

Ground state to excited state

Energy is absorbed

Excited level to ground level

Energy is released

Photon

Is a fixed amount or quantum of light energy or other forms of electromagnetic radiation