Chem mod 1 unit 3 what s inside_an_atom
- 1. 2008 ENTER
- 2. 1. What’s inside an atom? 2. Table of Contents 3. Introduction 4. Structure of the Atom 5. Labelled Diagram of an Atom 6. Nature of the particles 7. Symbol of an Element 8. Atomic Number 9. Mass Number 10.Arrangement of electrons
- 3. After viewing this tutorial, you will be able to state the properties of electrons, protons and neutrons.
- 4. Atoms have three basic particles: 1. Proton 2. Neutron 3. Electron The protons and neutrons are found inside the nucleus. Key The electrons orbit the Proton nucleus on shells.to see labelled Click Neutron diagram Electron
- 5. shell electron proton nucleus neutron Key Proton Neutron Electron
- 6. Proton: large with positive charge + Neutron: large with no charge 0 Electron: small with negative charge -
- 7. An element is made up of the same kind of atoms. It can be written as a symbol. The symbol is derived from the English or the Latin names of the element. The first letter or the first two letters are used. Click here to see how the symbol of the element Krypton here can be represented. Kr Symbol of Krypton
- 8. The atomic number of an element is found at the bottom left of the symbol. It tells how many protons are in the atom. Click here to see an example. Atomic Number 36 Kr Symbol of Krypton
- 9. The mass number of an element is found at the top left of the symbol. It tells the sum of the number of neutrons and protons found in the nucleus of an atom. Click here to see how the symbol of the element Krypton can be represented. Mass Number 84 Atomic Number 36 Kr Symbol of Krypton
- 10. Electrons are arranged in shells that move around the nucleus situated in the centre of the atom. Shell No. of electrons 1st shell 2 electrons 2nd shell 8 electrons 3rd shell 18 electrons 4th shell 32 electrons
Editor's Notes
- #2: Sub-atomic particles are found within the atom. These include the protons, electrons and neutrons.
- #5: The protons and neutrons are found inside the nucleus. The electrons orbit the nucleus on shells.
- #6: The protons and neutrons are found inside the nucleus. The electrons orbit the nucleus on shells.
- #8: The symbol can also reflect the atomic number and the mass number. The atomic number is found at the bottom left of the symbol and the mass number is located at the top left of the symbol.
- #9: The symbol can also reflect the atomic number and the mass number. The atomic number is found at the bottom left of the symbol and the mass number is located at the top left of the symbol.
- #10: The symbol can also reflect the atomic number and the mass number. The atomic number is found at the bottom left of the symbol and the mass number is located at the top left of the symbol.
- #11: Remove aniamtion