Unit 14 · Characteristics of period and group in periodic table

Electronic configuration of elements based on sub shells Presentation

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Science and Technology, Grade 10 · Unit 14

Electronic configuration based on subshells

Shells and subshells · s, p, d, f · Aufbau's principle

By the end of this lesson you can

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Tell a shell, a subshell and an orbital apart

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Name the subshells of K, L, M, N and their capacities

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State Aufbau's principle and the filling order

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Write subshell configurations of elements 1 to 20

Three levels inside an atom

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Shell: the path electrons revolve in, like a floor

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Subshell: a division of a shell, like a classroom

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Orbital: where electrons are found, like a bench

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Presenter notes: Today we look inside the shells of an atom and find that each shell has smaller parts. By the end you will write configurations like 1s², 2s²2p⁶ for the first twenty elements.