3.3 Electron Configuration Objective 4:b and c

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Presentation transcript:

3.3 Electron Configuration Objective 4:b and c Chemistry

Essential Questions What is an electron configuration? What is the Aufbau Principle? What are the 2 notations and how do you write them?

Electron Configuration Electron configuration is the arrangement of electrons in an atom The two types of electron configuration is standard configuration and noble gas notation.

Electron Configuration (cont) Recall: orbitals can only hold 2 electrons Orbitals come in the following sets: 1 of s, 3 of p, 5 of d, and 7 of f The orbitals listed in order of increasing energy would be s, p, d, and f.

Blocks of the Periodic Table Energy levels are represented by n n equals the row number on the periodic table

Aufbau Principle Electrons enter the lowest available energy orbital first

Example: Nitrogen atomic # 7 Standard notation: 1s2 2s2 2p3 Noble Gas Notation: [He] 2p3

Essential Questions What is an electron configuration? What is the Aufbau Principle? What are the 2 notations and how do you write them?

3.3 Tracked Assignments Worksheet