Atomic Structure

What you'll learn

• Describe the structure of the atom as mostly empty space surrounding a very small nucleus that consists of protons and neutrons and state that electrons are found in shells in the space around the nucleus
• Identify and describe protons, neutrons and electrons in terms of their relative charges and relative masses
• Use and understand the terms atomic (proton) number and mass (nucleon) number
• Deduce the behaviour of beams of protons, neutrons and electrons moving at the same velocity in an electric field
• Understand that ions are formed from atoms or molecules by gain or loss of electrons
• Deduce the numbers of protons, neutrons and electrons present in both atoms and ions given atomic (proton) number, mass (nucleon) number and charge
• Define the term isotope in terms of numbers of protons and neutrons
• Explain why isotopes of the same element have the same chemical properties
• Explain why isotopes of the same element have different physical properties (limited to mass and density)

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