Physical properties
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Physical Properties. 1. 2. 3. 4. Pure Substance or Mixture. What Type of Mixture?. Cement. What Type of Mixture?. What type of Mixture?. Smoke. Blood. What Type of Mixture?. Acid Rain. Dalton’s Atomic Theory element is made up of ATOM… the smallest particle in matter.

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Pure substance or mixture
Pure Substanceor Mixture







Atomic models

Dalton’s Atomic Theory

element is made up of ATOM… the smallest particle in matter

Atomic Models

Thompson’s – Plum Pudding

atoms contain negatively charged ELECTRONS

Rutherfored’s – Planetary Model

atom is like solar system with NUCLEUS in centre

Bohr’s – Atomic Model

atom is like solar system … electrons move in a fixed orbit

Electron Cloud

electrons form a cloud around the nucleus


The atom
The Atom

  • ATOM – smallest particles of an element that have the properties of the element

  • NUCLEUS – dense region at centre of atom and contains

    → PROTONS– positively charged

    → NEUTRONS– neutrally charged

  • ELECTRONS – negatively charged particles located around the nucleus


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