Flashcards
2.2.1 Electron Structure
Cards in this deck (18)
- 1What does the principal quantum number indicate?The shell occupied by the electrons
- 2What is a shell?A group of orbitals with the same principal quantum number
- 3How many electrons can the 1st shell hold?2
- 4How many electrons can the 2nd shell hold?8
- 5How many electrons can the 3rd shell hold?18
- 6How many electrons can the 4th shell hold?32
- 7What is an orbital?A region around the nucleus that can hold up to two electrons with opposite spins
- 8How many electrons can an orbital hold?2
- 9What are the 4 types of orbitals and properties● s orbital (spherical shape, 2e)
● p orbital (dumb-bell shape, 6e)
● d orbital (10e)
● f orbital (14e) - 10When using ‘electrons in box’ representation, what shape is used to represent the electrons?arrows
- 11What letter is used to represent the shell number?n
- 12From which shell onwards is S orbital present?n= 1
- 13From which shell onwards is D-orbital present?n= 3
- 14From which shell onwards is F-orbital present?n= 4
- 15What are the rules by which electrons are arranged in a shell?● Electrons are added one at a time
● Lowest available energy level is filled first
● Each energy level must be filled before the
next one can fill
● Each orbital is filled singly before pairing
● 4s is filled before 3d - 16Why does 4s orbital fill before 3d orbital?4s orbital has a lower energy than 3d before it is filled
- 17What is the electron configuration of krypton?1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6
- 18Which electrons are lost when an atom becomes a positive ion?Electrons in the highest energy levels
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- A level Chemistry (Module 2- Foundations in chemistry) Flashcards on 2.2.1 Electron Structure , created by Aania Bokhari on 28/02/2019.
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- Aania Bokhari
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