electron config. Flashcards
What is the electron configuration of an atom?
The distribution of electrons among the various orbitals and subshells of an atom.
True or False: Each orbital can hold a maximum of two electrons.
True
Fill in the blank: The subshells are designated as ___, ___, ___, and ___.
s, p, d, f
What is an orbital?
A region in an atom where there is a high probability of finding electrons.
How many orbitals are in a p subshell?
3
Multiple Choice: Which of the following subshells has the highest energy? A) 3s B) 3p C) 4s D) 3d
D) 3d
What principle states that electrons fill orbitals starting with the lowest energy first?
Aufbau principle
True or False: The maximum number of electrons that can occupy a d subshell is 10.
True
How many total electrons can an s subshell hold?
2
Multiple Choice: Which of the following has the electron configuration [Ne]3s²3p⁵? A) Cl B) Ar C) Br D) F
C) Br
What does the term ‘degenerate orbitals’ refer to?
Orbitals that have the same energy level.
True or False: The 4s subshell is filled before the 3d subshell.
True
Fill in the blank: The principal quantum number (n) indicates the ___ of the electron shell.
size and energy level
What is the maximum number of electrons in a p subshell?
6
Multiple Choice: Which atom has the electron configuration 1s²2s²2p⁶? A) He B) Ne C) Ar D) Kr
B) Ne
What is the shape of an s orbital?
Spherical
True or False: Each d subshell has 5 orbitals.
True
What is the electron configuration for oxygen (O)?
1s²2s²2p⁴
Fill in the blank: The maximum number of electrons in a f subshell is ___.
14
Multiple Choice: How many electrons can the third principal energy level hold? A) 8 B) 18 C) 32 D) 2
B) 18
What is the term for the three-dimensional representation of the space where an electron is likely to be found?
Electron cloud
True or False: Electrons in the same orbital must have opposite spins.
True
What is the order of filling orbitals according to the Aufbau principle?
1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, etc.
how do electrons fill orbitals
singly before doubling up
what two elements are an exception to the rule of filling up the lowest energy first?
copper and chromium:
fill up 3d before 4s instead
what is spin?
electron property of up or dowm
