Areas on PT
A horizontal row on the periodic table, where elements share the same number of electron shells
Periods
This scientific principle states that mass in an isolated system is neither created nor destroyed during chemical reactions or physical transformations
law of Conservation of Mass
This thin layer of corrosion forms over metals such as copper, brass, aluminum, magnesium, and neodymium, often acting as a protective coating.
Tarnish
This neutral, crystalline ionic compound results from the reaction of an acid and a base and is made of cations and anions held together by strong ionic bonds, which dissociate in water to form electrolytes.
Salt
can dissolve in another substance
Soluble
a chemical element lacking typical metallic properties, found on the right side of the periodic table
Non-metals
The electrons in an atom's outermost energy shell
Valence Electrons
This physical property of a material—usually a metal—allows it to be hammered, pressed, or rolled into thin sheets or different shapes without breaking
Malleable
description of materials that fracture easily with very little or no deformation when stressed
Brittle
relating to the periodic table of the elements or the pattern of chemical properties that underlies it.
Periodic
-a group of highly unreactive, colorless, odorless, monatomic elements
noble gases
name for the number of protons in an atom.
atomic number
the quality or condition of being hard.
Hardness
do non metals tend to gain or lose electrons to form negative ions
Gain
how the electrons are “stacked” around an atom’s center (nucleus).
Electron configurations
defined by losing electrons to form positive ions
Metals
a molecule made of two atoms of the same or different elements.
Diatomic
materials that allow electricity or heat to pass through them easily.
Conductors
materials that conduct electricity better than insulators but less than conductors
Semiconductor
a prefix from Greek meaning four
tetra
an element with properties intermediate between metals and nonmetals
metalloids
different forms of the same element that have different shapes and properties.
Allotropes
having a high degree of compactness.
High Density
an atom or group of atoms that has a negative charge because it has gained electrons.
Anion
the size of an atom, measured by how far its outer electrons are from the center.
atomic radius