Periodic Table 02: Class Notes || Inorganic Chemistry

Vocabulary and categorization flashcards based on the Inorganic Chemistry lecture notes regarding electronic configuration, period composition, and the Aufbau Principle.

Ultimate shell

The outermost shell, designated as the $n^{th}$ shell.

Pen-ultimate shell

The shell designated as $(n-1)^{th}$.

Ante-penultimate shell

The shell designated as $(n-2)^{th}$.

Aufbau Principle

A principle stating that electrons first fill subshells of the lowest available energy, then fill subshells of higher energy.

Subshell Orbitals

The number of orbitals per subshell: s ($1$), p ($3$), d ($5$), f ($7$), and g ($9$).

1st Transition series

The $3d$ Series.

Lanthanoids

The $4f$ Series.

Actinoids

The $5f$ Series.

Group III

The group in which both Lanthanoids and Actinoids are present.

Period 1 Element Count

Contains $2$ elements ($1s$).

Period 2 and 3 Element Count

Contains $8$ elements ($2 + 6$).

Period 4 and 5 Element Count

Contains $18$ elements ($2 + 10 + 6$).

Period 6 and 7 Element Count

Contains $32$ elements ($2 + 14 + 10 + 6$).

Period 9 (Assumed) Element Count

Contains $50$ elements ($2 + 18 + 14 + 10 + 6$).

Energy Sequence for Period 6

$6s$ $4f$ $5d$ $6p$.

S block

Consists of configurations $1s^1$ to $7s^2$.

P block

Consists of configurations $2p^1$ to $7p^6$, excluding Helium.