Year 9 Science Atoms & Ions Dr Sharma Lesson Objective: To gain knowledge & understanding of the relationship between atoms & ions
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Year 9 Science
Atoms & Ions
Dr Sharma
Lesson Objective: To gain knowledge & understanding of the relationship between atoms & ions
2 Enjoy ! Dr Lakshmi Sharma Year 9 Science Atoms & Ions
What’s in an Atom ???
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Atoms
ProtonsNeutrons =Electrons
Where are they in an atom ?
SUBATOMIC PARTICLES
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AtomsProtons nucleus
Neutrons nucleus
ElectronsOrbit around the nucleus in electron clouds
Cannot determine exact location
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Atoms
ProtonsNeutronsElectrons
What’s their charge ?
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Atoms
+ ProtonsNeutral Neutrons- Electrons
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Elements
Calculate the number of protons, electrons & neutrons for Na
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Isotopes
These are isotopes of Hydrogen & Helium - why ???
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Isotopes
Same number of protons
Different numbers neutrons
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Electrons – Shell Diagram
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Shell DiagramsMolecular Orbital Theory
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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 electronNa+Anion is formed when an atom gains an electronCl-
Looking at charge of the atom
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Let’s Build an Atom, form a cation/anionBuild 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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Hope you Enjoyed the Lesson
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