Modern Periodic Table and Periodic Law

Vocabulary based on the introduction to the Modern Periodic Table, Moseley's contributions, and the structure of the long form of the periodic table.

Moseley

The scientist who proposed the Modern Periodic Table (Modified Mendeleev's Periodic Table) and demonstrated that properties of elements are functions of atomic number.

Atomic number ($Z$)

The fundamental basis upon which the Modern periodic table is organized.

Moseley's Experiment

An experiment where high speed electrons were bombarded on different metal surfaces to obtain X-rays, establishing the relationship between frequency ($\nu$) and atomic number ($Z$).

$$\sqrt{\nu} \propto Z$$

The mathematical relationship found by Moseley where the square root of the frequency ($\nu$) of X-rays is proportional to the atomic number ($Z$) of the metal.

Modern Periodic Law

The principle stating that the physical and chemical properties of the elements are a periodic function of their atomic number.

Bohr, Bury & Rang, Werner Periodic Table

Alternative names for the Long form or Present form of the Modern periodic table.

Bohr-Bury Electronic Configuration Concept

One of the two concepts, along with atomic number, that the Modern long form periodic table is based upon.

Rang & Werner

The scientists who proposed the specific model for the long form of the Modern periodic table.

Periods and Groups (Long Form)

The structural layout of the Modern periodic table consisting of 7 periods and 18 vertical columns (groups).

I. U. P. A. C. Group Naming

The system that names the 18 vertical columns of the periodic table as the 1st to 18th group.

Group IA

Corresponds to Group 1 in the long form of the periodic table.

Group IIA

Corresponds to Group 2 in the long form of the periodic table.

Group IIIB

Corresponds to Group 3 in the long form of the periodic table.

Group VIII

A group in Mendeleev's table that corresponds to Groups 8, 9, and 10 in the long form of the periodic table.

Group IB

Corresponds to Group 11 in the long form of the periodic table.

Group IIB

Corresponds to Group 12 in the long form of the periodic table.

Group VIIA

Corresponds to Group 17 in the long form of the periodic table.

Group 0

A group in Mendeleev's table that corresponds to Group 18 in the long form of the periodic table.