1
Explain atoms as basic units of elements
Describe atoms as the basic units that make up elements.
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Structure of an Atom
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2
Differentiate electrons protons and neutrons
Compare subatomic particles by charge, mass idea and position.
3
Describe Thomson atomic model
Explain Thomson model and its limitation.
4
Describe Rutherford atomic model
Explain Rutherford scattering model and nuclear atom idea.
5
Describe Bohr atomic model
Explain shells and stable orbits in Bohr model.
6
Distribute electrons in shells up to 18 elements
Write K, L and M shell distribution for elements up to atomic number 18.
7
Apply maximum electron capacity rule
Use shell capacity rules to arrange electrons.
8
Define atomic number and mass number
Explain atomic number and mass number with notation.
9
Calculate protons neutrons and electrons
Calculate particle numbers from atomic and mass numbers.
10
Explain valence electrons and valency
Relate outer-shell electrons to combining capacity.
11
Interpret atomic data to classify elements
Use atomic mass, shell capacity and valency data accurately.
12
Differentiate isotopes and isobars
Compare atoms with same atomic number or same mass number.
13
Apply symbols for first eighteen elements
Use correct chemical symbols for the first eighteen elements.
14
Draw labelled atomic models
Draw Thomson, Rutherford and Bohr model diagrams.
15
Design atom model activities
Create models or games using atomic number, mass number and particles.
16
Discuss evolution of atomic structure
Explain how discoveries changed atomic models over time.
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