Presentation on theme: "Atoms and other Building Blocks of Matter by Dr H - W Winter Blue slides Just read and enjoy Yellow slides Complete the tasks on your worksheets."— Presentation transcript:
Atoms and other Building Blocks of Matter by Dr H - W Winter Blue slides Just read and enjoy Yellow slides Complete the tasks on your worksheets
Atomic Theory Atoms are so small that we cannot see them, even with the best microscopes in the world. An atom is an incredibly small building block of matter.
ATOMS ARE EVERYWHERE But, having said that ……… Name 3 substances that are made of atoms
How Many Atoms? Roughly how many atoms do you think there are in a teaspoon of sulfur (about 5g)? There are over 100 different types of atoms. Each one forms a different chemical element. These elements are listed in the periodic table. 100000 000000 000000 000000 (or about 10 23 )
Atoms can now be “seen” using special technology Image of individual atoms in Mica (Image courtesy of Veeco Instruments Inc http://www.veeco.com)
Two Examples of Atoms The Carbon Atom proton The Hydrogen Atom electron electrons protons & neutrons
Atoms are made from sub-atomic particles 1. Protons (+ electric charge), p 2. Electrons (– electric charge), e 3. Neutrons (no charge), n Protons and neutrons have about the same mass. Electrons have about 2000 times less mass than protons. Electrical Forces produce an attraction between the electrons and the protons in the nucleus. This is because they are oppositely charged.
Table of Sub-Atomic Particles Name Mass (mass units) Charge on Particle Where foundSymbol Proton1+Nucleusp+p+ Electron1/2000- Electron shells e-e- Neutron10Nucleusnono Have you finished copying the information?
ORB Education Quality Teaching Resources ORB Education Visit http://www.orbeducation.com.au for the full, editable versions with solutions. ScP034 – Atoms PowerPoint Remainder removed from this sample presentation.