"Element-logy" likely refers to the study of elements, which belong to the Periodic Table of elements. Elements are substances that cannot be broken down into simpler components and are represented by a unique chemical symbol.
Gadolinium (Gd) is an element.
Hydrogen
Metals
The transition metals.
noble gas
AKEM
Gold belongs to the metal element class.
The element neon belong to the periodic group of noble gases, these are also called inert gasses. The element when under standard condition has no odor, no color and has a monatomic gas.
group 16
the transition metals.
carbon family
noble gases