Vocab 12: Periodic Table

compound

Combination of substances (elements) that are chemically combined (bonded)

periodic table

a chart that organizes information about all of the known elements according to their properties

chemical formula

code that uses chemical symbols and subscripts to identity the number and types of atoms in a compound

metalloid

elements on the dividing line of the Periodic Table. Elements have some properties of both metals and non metals

metal

elements on the left side of the Periodic Table. Known by their properties: Shiny, ductile, and malleable

nonmetal

elements on the right side of the Periodic Table. Known by their properties: Dull in color, brittle, and not malleable.

period

horizontal row in the periodic table.

coefficient

in a chemical formula, the large number in front that tells how many molecules are present

subscript

in a chemical formula, the small number that identifies how many atoms of each type are in a molecule.

Law of Conservation of Matter

matter cannot be created or destroyed, it can only change from one form to another

chemical symbol

one or two letter code that represents an element; derived from the Latin name for the element

reactant

the substances that exists before a reaction occurs (ingredients)

product

the substances that remain after a reaction takes place (resulting molecules)

group

vertical column in the periodic table, another name for "family". Elements in the same group or family have similar properties.

family

vertical column in the periodic table, another name for "group". Elements in the same group or family have similar properties.