Lesson 8

Period 3

Elements

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Slide 1: Slide

states of matterMiddelbare schoolhavo, vwoLeerjaar 1

This lesson contains 22 slides, with text slides and 1 video.

Items in this lesson

Period 3

Elements

Slide 1 - Slide

This lesson

Recap
4.3 The evolution of our understanding of the atom
Working independently

Slide 2 - Slide

Learning goals

Describe the Dalton model, the Thomson model, the Rutherford model and the Bohr model
Explain how the Rutherford experiment shows that the Thomson model is not correct
Describe the key features of the Bohr model

Slide 3 - Slide

What have we learned about atoms

already?

Slide 4 - Slide

Atoms

Comes from the word Atomos — indivisible

The building blocks of everything in the universe

There are many types of atoms called elements organised in the periodic table

Slide 5 - Slide

The evolution of our understanding of the atom

Slide 6 - Slide

Dalton — Thomson — Rutherford — Bohr

Slide 7 - Slide

Dalton

All matter is made up of atoms
Atoms are indivisible particles
There are many types of atoms (elements)
Atoms of the same elements have the same mass

Slide 8 - Slide

Thomson

Plum pudding model

Slide 9 - Slide

Thomson

Plum pudding model

A blob of positive and negative charges

Slide 10 - Slide

The Rutherford experiment

Slide 11 - Slide

Slide 12 - Video

Rutherford model

Slide 13 - Slide

Rutherford model

An atom is

A nucleus containing protons and neutrons
With a cloud of electrons around it

Slide 14 - Slide

The Bohr model

Slide 15 - Slide

The Bohr model

A nucleus — protons + Neutrons
Electrons in fixed orbits around it

Slide 16 - Slide

Working independently

Link

Slide 17 - Slide

Working independently

Do: 4.5 exercise 1 + 2

Slide 18 - Slide

The charge cloud model

(advanced)

Slide 19 - Slide

Slide 20 - Slide

The homework