Atomic Structure - Bohr and Orbital Model

Discovered electrons are in an electron cloud

Ernest Rutherford

Person who broke down the arrangement insight of electrons in an atom

Niels Bohr

Bohr’s study explained

The arrangement of electrons in an atom

When a white light passes through a glass prism it breaks up light into an array of colours

How a spectra works

An array of colours

Spectrum

Array of colours with no gaps

Continuous spectrum

Rainbows. Raindrops act as the prism and sunlight shines through creating a continuous spectrum

Continuous spectrum

Bohr replaced white light for a hydrogen discharge tube. This found a series of lines instead of a continuous spectrum.

Bohr’s study

A series of lines instead of a continuous spectrum

Line spectrum

Electric current emits when passed through hydrogen

Emission line spectrum or line emission spectrum

Used to study emission line spectrum or line emission spectrum. When light is emitted through ither gases (neon, sodium, mercury etc.) they are I’ll show unique spectra. Best used in a dark room

Spectrometer

Each element light emission spectra is unique and acts as a finger print to detect the presence of certain chemicals

Unique spectra

Steel is tested for different metals by light emission testing

Unique spectra example

Yellow

Coloured flames: Sodium

Lilac

Coloured flames: Potassium

Blue-green

Coloured flames: Copper

Crimson

Coloured flames: Lithium

Green

Coloured flames: Barium

Red

Coloured flames: Strontium