Periodic Table Vocabulary Cards

Front 1

Group/Family:
two or more atoms specifically arranged.

Back 1

Period:
A division of geologic time that is longer than an epoch and shorter than an era.

Front 2

Metal:
A substance with high electrical conductivity, luster, and malleability, which readily loses electrons to form positive ions

Back 2

Non-Metals:
One of the elements which do not exhibit metallic properties.

Front 3

Metalloid:
an element with properties intermediate between those of a metal and nonmetal.

Back 3

Alkali Metals:
An alkali metal is any of the elements found in Group IA of the periodic table. Alkali metals are very reactive chemicals.

Front 4

Alkaline Earth Metals:
An alkaline earth metal is an element belonging to group 2 of the periodic table.

Back 4

Periodic Table:
The periodic table is a tabular arrangement of the chemical elements by increasing atomic number which displays the elements so that one may see trends in their properties.

Front 5

Periodic Law:

the principle that the properties of the chemical elements recur periodically when the elements are arranged in increasing order of their atomic numbers.

Back 5

Henry Moseley:
Henry Moseley (1887-1915), A British chemist, Henry Moseley studied under Rutherford and brilliantly developed the application of X-ray spectra to study atomic structure; Moseley's discoveries resulted in a more accurate positioning of elements in the Periodic Table by closer determination of atomic numbers.

Front 6

Halogens:
The halogens are five non-metallic elements found in group 17 of the periodic table.

Back 6

Noble Gases:
Any of the elements found in Group 8 at the far right of the Periodic Table.

Front 7

Dmitri Mendeleev:
Mendeleev is best known for his work on the periodic table; arranging the 63 known elements into a Periodic Table based on atomic mass, which he published in Principles of Chemistry in 1869.

Back 7

Valence Electrons:
Electrons in the outermost shell of an atom, no matter what principle energy level.