This science lesson covers subatomic particles like protons, neutrons, and electrons and their locations and charges in atoms. It discusses isotopes which have the same number of protons but different neutrons. Students are asked to draw shell diagrams for boron and phosphorus atoms and use an online simulation to build atoms and form cations and anions by gaining or losing electrons. The goal is for students to gain knowledge and understanding of the relationship between atoms and ions.

1. Year 9 Science
Atoms & Ions
Dr Sharma
Lesson Objective:To gain
knowledge & understanding of
the relationship between atoms &
ions

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What’s in an Atom ???

3. Atoms
Protons
Neutrons =
Electrons
Where are they in an atom ?
SUBATOMIC
PARTICLES
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4. Atoms
Protons nucleus
Neutrons nucleus
Electrons Orbit around the nucleus in electron clouds
Cannot determine exact location
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5. Atoms
Protons
Neutrons
Electrons
What’s their charge ?
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6. Atoms
+ Protons
Neutral Neutrons
- Electrons
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7. Elements
Calculate the number of protons,
electrons & neutrons for Na
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9. Isotopes
These are isotopes of Hydrogen & Helium - why ???
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10. Isotopes
Same number of protons
Different numbers neutrons
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11. Electrons – Shell Diagram
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Shell Diagrams
Molecular OrbitalTheory

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Can you draw shell diagram for B & P ?

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Atoms & Ions
Cation is formed when an atom loses an electron
Na+
Anion is formed when an atom gains an electron
Cl-
Looking at charge of the atom

16. Let’s Build an Atom, form a cation/anion
Build an Atom
Open your devices & please go to this webpage
http://phet.colorado.edu/en/simulation/build-an-atom
Look at the charge when you add/take away
more protons or electrons. What happens????
Look at the periodic table try & make your atoms
Calculate Neutrons, Protons & Electons
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17. Hope you Enjoyed
the Lesson