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3 cards from this section. Quick, good the night before a test.
State the Aufbau Principle in simple terms.
Think about how a building is constructed, starting from the ground.
What is one consequence of the Pauli Exclusion Principle?
Remember the 'perfect pairing' concept.
According to the Aufbau Principle, which orbital is filled first?
Think about electrons preferring lower energy states.
True or False: The Pauli Exclusion Principle allows two electrons in the same orbital to have identical spins.
Recall how electrons need to 'pair up' differently.
Suppose you have an element with atomic number 17. Write down its electron configuration, and apply the principles discussed.
Break down and fill according to the stated filling order.
How would the electron configuration differ for an ion, say Cl⁻, after gaining an electron?
Think about what happens when the atom gains an electron.
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