Electron Configuration (3.1)
where electrons are located at any given point in time around a nucleus according to the quantum mechanical model
What is Electron Configuration?
a horizontal row on the periodic table; also represents the total number of energy levels that atom contains
What is a Period?
an atom that has gained an electron(s) and has a negative charge
What is an Anion?
the ending material(s) in a chemical reaction; everything shown after the arrow
What are the Products?
the breakdown of a single compound into two or more fragments
What is a Decomposition Reaction?
this represents how close or far electrons are from the nucleus; associated with the periods on the Periodic Table
What are Energy Levels?
a vertical column on the periodic table; also represents atoms with similar chemical properties and the same number of valence electrons
What is a Group?
the molecules formed when a metal transfers its valence electrons to a nonmetal
What are Ionic Compounds?
the starting materials in a chemical reaction; everything before the arrow
What are the Reactants?
the combination of multiple reactants combine to form a single product
What is a Synthesis Reaction?
This is represented by arrows that show the direction in which the electrons travel.
What is an Orbital?
The number of valence electrons in this family may vary.
What are the Transition Metals?
a metal becomes this when it donates electrons to a nonmetal
What is a Cation?
a number below the normal line of type; represents the number of each element in a compound
What is a Subscript?
This is a series of metals, arranged by their "reactivity" from highest to lowest according to their ease of oxidation.
What is the Activity Series?
This is represented by a letter (s, p, d, or f) which shows the shape of an electron’s path.
What is a Sublevel?
the family in Group 17 on the Periodic Table
What are the Halogens?
the molecule formed when two or more nonmetals share valence electrons
What is a Molecular or Covalent Compound?
"Mass is neither created nor destroyed, it can only be transformed."
What is the Law of Conservation of Mass?
reactions involving a change in an atom's nucleus
What are nuclear reactions?
This family of elements are located on Group 18 of the Periodic Table.
the energy required to remove an electron from its orbital
What is Ionization Energy?
a covalently bonded set of 2 or more atoms that behave as a single unit and that has a charge
What is a Polyatomic Ion?
a number placed before (and multiplying) the element/compound in a chemical equation
What is a coefficient?
In a redox reaction, this is the process of losing an electron.
What is Oxidation?
This model shows where electrons exist in three-dimensional space rather than just flat orbits like the models preceding it.
What is the Quantum Mechanical model?
a measure of an atom’s attraction for another atom’s electrons
What is Electronegativity?
This structure shows both the element symbol and the number of valence electrons.
What is the Lewis Dot Structure?
the solid formed from a reaction of two liquids
What is a Precipitate?
when the cations or anions switch places between two reactants to form new products
What is a Double Replacement/Displacement Reaction?