Electronic Structure (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards
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Where do electrons exist in an atom?
Where do electrons exist in an atom?
Energy levels (also called shells or orbits)
Alternative names for energy levels (2)
Alternative names for energy levels (2)
Shells or orbits
Which energy level fills with electrons first
Which energy level fills with electrons first
The lowest (innermost) energy level
Max number of electrons in first energy level
Max number of electrons in first energy level
2
Max number of electrons in second energy level
Max number of electrons in second energy level
8
Max electrons in third level (elements 1-20)
Max electrons in third level (elements 1-20)
8
How electronic structure is written
How electronic structure is written
Numbers separated by commas (one for each energy level)
Electronic structure of sodium
Electronic structure of sodium
2,8,1
What sodium's 2,8,1 structure means
What sodium's 2,8,1 structure means
2 electrons in 1st, 8 in 2nd, 1 in 3rd level
How to find electronic structure (2 methods)
How to find electronic structure (2 methods)
From atomic number or position in periodic table
How many elements' structures you must know
How many elements' structures you must know
First 20 elements