Atomic Structure And The Periodic Table Flashcards Preview

AP Chem > Atomic Structure And The Periodic Table > Flashcards

Flashcards in Atomic Structure And The Periodic Table Deck (8)
Loading flashcards...
0

Aufbau principle

When building up the electron configuration of an atom, electrons are placed in orbitals, subshells, and shells in order of increasing energy

1

Pauli Exclusion Principle

Within an atom, no two electrons can have the same set of quantum numbers. So, each electron has its own distinct set of four quantum numbers.

2

Hund's Rule

When an electron is added to a subshell, it will always occupy an empty orbital if one is available. Electrons always occupy orbitals singly of possible and pair up only if no empty orbitals are available.

3

Diamagnetism

A type of magnetism in which elements have all of their electrons spin paired( all subshells completed)

4

Paramagnetism

Elements that do not have all of their electrons spin paired; elements with not all subshells completed

5

Quantum numbers

The positions of the electrons in relation to the nucleus
Four quantum numbers: shell, subshell, orbital, spin

6

Four quantum numbers

Shell (principle quantum number n)
Subshell (angular momentum quantum number l)
Orbital (magnetic quantum number ml)
Spin (ms)

7

Quantized energy of an electron formula

En = (-2.178x10^-18)/n^2 joules

n = principal quantum number of the electron