electronic configuration Flashcards
(16 cards)
What is electronic configuration?
The distribution of electrons in an atom’s orbitals.
True or False: The electronic configuration of an atom determines its chemical properties.
True
Fill in the blank: The maximum number of electrons in the first energy level is _____
2
What is the Aufbau principle?
Electrons occupy the lowest energy orbitals first.
Which of the following is the correct electronic configuration for oxygen? A) 1s² 2s² 2p⁴ B) 1s² 2s² 2p⁶ C) 1s² 2s² 2p³
A) 1s² 2s² 2p⁴
What does the Pauli Exclusion Principle state?
No two electrons in an atom can have the same set of four quantum numbers.
What is the significance of the Hund’s rule?
Electrons will fill degenerate orbitals singly before pairing up.
True or False: The electronic configuration of an atom can change if it gains or loses electrons.
True
What is the electronic configuration of a sodium ion (Na⁺)?
1s² 2s² 2p⁶
Fill in the blank: The d-block elements are also known as _____ elements.
transition
Which quantum number describes the shape of an orbital?
Azimuthal quantum number (l)
What is the maximum number of electrons that can occupy a single p orbital?
2
What is the electronic configuration of chlorine (Cl)?
1s² 2s² 2p⁶ 3s² 3p⁵
True or False: All elements in the same group of the periodic table have the same electronic configuration.
False
What is the notation used to represent electron configurations?
Using orbital diagrams or notation like 1s², 2s², etc.
