Development of the Periodic Table and Atomic Structure

These flashcards cover key terms and concepts related to the development of the periodic table and atomic structure, helping students understand the organization and classification of elements.

Periodic Table

A table where elements are arranged by atomic number and grouped by similar properties.

Atomic Number

The number of protons in an atom's nucleus, determining its position in the periodic table.

Group

A column in the periodic table that contains elements with similar properties.

Mendeleev

A scientist who developed an early version of the periodic table and left gaps for undiscovered elements.

Isotopes

Atoms of the same element with different numbers of neutrons, explaining inconsistencies in early atomic weight arrangements.

Metals

Elements that react to form positive ions, typically found on the left and bottom of the periodic table.

Non-metals

Elements that do not form positive ions, located on the right and top of the periodic table.

Characteristic properties

The distinct physical and chemical traits that differentiate metals from non-metals.

Electron arrangement

The distribution of electrons in an atom which influences an element’s chemical behavior and reactivity.

Reactivity

The tendency of an element to undergo chemical reactions, influenced by its electron configuration.