Periodic Table of Elements Overview

Vocabulary flashcards covering the element classifications, group designations, state representations, and notation conventions used in the Periodic Table of Elements.

Atomic Weight in Parentheses

The notation used on the periodic table for elements with no stable isotopes, where the value in parentheses represents the mass number of the isotope with the longest half-life.

Alkali Metals

The chemical group of metallic elements located in Group $1$ of the periodic table, consisting of lithium, sodium, potassium, rubidium, caesium, and francium (excluding hydrogen).

Alkaline Earth Metals

The group of electropositive metallic elements found in Group $2$ of the periodic table, comprising beryllium, magnesium, calcium, strontium, barium, and radium.

Transition Metals

The central block of metallic elements spanning Groups $3$ through $12$ of the periodic table, characterized by partially filled d-orbitals.

Lanthanoids (Lanthanides)

The series of $15$ metallic elements with atomic numbers $57$ through $71$, beginning with lanthanum ($\text{La}$) and ending with lutetium ($\text{Lu}$).

Actinoids (Actinides)

The series of $15$ radioactive metallic elements with atomic numbers $89$ through $103$, beginning with actinium ($\text{Ac}$) and ending with lawrencium ($\text{Lr}$).

Lanthanoid and Actinoid Inset Series

The two rows displayed beneath the main body of the periodic table consisting of elements $57\text{--}71$ (lanthanoids) and elements $89\text{--}103$ (actinoids).

Post-transition Metals

The metallic elements located between the transition metals and metalloids, which include aluminium, gallium, indium, tin, thallium, lead, and bismuth.

Metalloids

The elements with properties intermediate between metals and nonmetals, forming a diagonal boundary on the periodic table that includes boron, silicon, germanium, arsenic, antimony, and tellurium.

Pnictogens

The family of elements categorized under Group $15$ of the periodic table, consisting of nitrogen, phosphorus, arsenic, antimony, bismuth, and moscovium.

Chalcogens

The family of elements categorized under Group $16$ of the periodic table, which includes oxygen, sulfur, selenium, tellurium, polonium, and livermorium.

Halogens

The group of highly reactive nonmetallic elements located in Group $17$ of the periodic table, including fluorine, chlorine, bromine, iodine, astatine, and tennessine.

Noble Gases

The series of chemically inert, stable gaseous elements found in Group $18$ of the periodic table, consisting of helium, neon, argon, krypton, xenon, radon, and oganesson.

State of Matter Color Coding (Ptable)

The visual convention classifying the state of an element under standard conditions: black indicates a solid, blue indicates a liquid, red indicates a gas, and grey indicates an unknown state.