Electronic structure (AQA GCSE Chemistry Combined Science): Flashcards
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Electronic structure
Electronic structure
How electrons arrange themselves around nucleus
Energy levels/shells
Energy levels/shells
Specific areas where electrons sit
Shell with lowest energy
Shell with lowest energy
Innermost shell
Order electrons fill shells
Order electrons fill shells
Lowest available energy levels first
Max electrons: 1st shell
Max electrons: 1st shell
2
Max electrons: 2nd shell
Max electrons: 2nd shell
8
Max electrons: 3rd shell
Max electrons: 3rd shell
8
Shell capacity pattern (1st 20 elements)
Shell capacity pattern (1st 20 elements)
2,8,8,2
Electronic structure of sodium (Na, atomic no. 11)
Electronic structure of sodium (Na, atomic no. 11)
2,8,1
Electronic structure of oxygen (O, atomic no. 8)
Electronic structure of oxygen (O, atomic no. 8)
2,6
Atomic number tells you (neutral atoms)
Atomic number tells you (neutral atoms)
Number of electrons
Group number tells you
Group number tells you
Number of electrons in outer shell