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Chemistry11 Atomic Structure: HOME



St Stephen's School would like to acknowledge the contribution of

Mr Darryl Fernandez,

a Teacher Librarian (Secondary) at the Carramar campus from 2012 - 2015, and the original author of this guide.

This guide is now being maintained by another staff member.

  Click on this image to find to go to a brief science historical perspective on the atom:

Vocabulary and Definitions

Atom - The smallest object that retains properties of an element. Composed of electrons and a nucleus (containing protons and neutrons). Atomic Number - Number of protons in an element.

Orbitols - An energy state in the atomic model which describes where an electron will likely be.

Nucleus -The central part of an atom that contains the protons and neutrons. Plural nuclei.

PhotonMassless packet of energy, which behaves like both a wave and a particle.

Proton - Particle found in a nucleus with a positive charge. Number of these gives atomic number.

Valance Electrons - The electrons in the outermost shell of an atom.

Single Bond  - When an electron pair is shared by two atoms.

Quantum Numbers - Set of numbers used to completely describe an electron.

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