1.1b Particles in the atom and atomic radius

AS Level Chemistry 9701
Topic 1.1 Particles in the atom and atomic radius
17 August 2023
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ChemistrySecondary EducationAge 12,13

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AS Level Chemistry 9701
Topic 1.1 Particles in the atom and atomic radius
17 August 2023

Slide 1 - Diapositive

We are learning to:
  • ✅ explain that atoms are mostly empty space surrounding a very small, dense nucleus that contains protons and neutrons; electrons are found in shells in the empty space around the nucleus
  • ✅ identify and describe protons, neutrons and electrons in terms of their relative charges and relative masses
  • define the terms atomic and proton number; mass and nucleon number
  • ✅ describe the distribution of mass and charge within an atom
  • describe the behaviour of beams of protons, neutrons and electrons moving at the same velocity in an electric field

Slide 2 - Diapositive

We are learning to:
  • determine the numbers of protons, neutrons and electrons present in both atoms and ions given atomic or proton number, mass or nucleon number and charge
  • state and explain qualitatively the variations in atomic radius and ionic radius across a period and down a group

Slide 3 - Diapositive

We are learning to:
  • define the term isotope in terms of numbers of protons and neutrons  
  • explain the notation for isotopes, where x is the mass or nucleon number and y is the atomic or proton number  
  • state that and explain why isotopes of the same element have the same chemical properties  
  • state that and explain why isotopes of the same element have different physical properties, limited to mass and density

Slide 4 - Diapositive

Review of previous learning
  • ⚗️ Sketch two atoms that are considered isotopes
  • ⚗️ Advance video viewing: Importance of isotopes

Slide 5 - Diapositive

Element Quiz 01
Instructions:
  • Fifteen elements will be shown.
  • Symbols or names shall be given.
  • Multiple choice or Short-answer.
  • Quizizz will be used for this activity. 
  • Marks will be based on the number of correctly-named elements.

Slide 6 - Diapositive

Slide 7 - Vidéo

Particles' paths when the electric field is switched on

Slide 8 - Diapositive

Activity 5. The Numbers of Subatomic Particles
Instructions:
  • ⚗️ Complete the worksheet AZPEN (Mass number, Atomic number, Proton number, Electron number, Neutron number).
  • ⚗️ Share your work with the class. Mark your output.

Slide 9 - Diapositive

AS Level Chemistry 9701
Topic 1.1 Particles in the atom and atomic radius
17 August 2023

Slide 10 - Diapositive

Are these atoms the same?

Slide 11 - Diapositive