Periodic table

Periodic Table

A systematic arrangement of chemical elements displayed in a tabular format, organized by atomic number, electron configuration, and recurring chemical properties.

Groups/Families

Columns in the periodic table that group elements with similar chemical behaviors, such as Group 1 which includes alkali metals like lithium, sodium, and potassium.

Periods

Rows in the periodic table where properties of elements gradually change as you move from left to right.

Metals

Elements typically found on the left side of the periodic table; they are good conductors of heat and electricity.

Nonmetals

Elements found on the right side of the periodic table; they have varying properties and are generally poor conductors.

Metalloids

Elements with properties intermediate between metals and nonmetals, often located along the staircase line in the periodic table.

Atomic Number

The number of protons in an atom, which determines its position in the periodic table.

Atomic Mass

The average mass of an atom of an element, often rounded to a whole number in the periodic table.

Periodic Trends

Observable trends within the periodic table, including electronegativity, ionization energy, and atomic radius that influence element interactions.

Significance of the Periodic Table

An essential tool in chemistry that provides insights into relationships between elements, predicts chemical reactions, and guides the discovery of new elements.