Valence & Octets
The name of the electrons found in the outermost shell of an atom that are involved in forming chemical bonds.
Valence Electrons
The attraction formed between oppositely charged ions
Ionic Bond
The charge of an atom that becomes an ion after losing one or more electrons
Positive (also called a Cation)
What happens when chemical bonds break and new bonds form, rearranging atoms into different substances
Chemical Reaction
An equation that adheres to the law of conservation of mass, is considered a _______
Balanced chemical Equation
The maximum number of valence electrons an atom can have
Eight (8)
The bond formed when two atoms share electrons
Covalent Bond
The charge of an atom that becomes an ion after gaining one or more electrons
NEGATIVE (also called an Anion)
The only sure evidence for a chemical reaction
Production of a new substance
A chemical reaction that absorbs energy in the form of heat
A chemical reaction that absorbs energy in the form of heat
The charge of ions formed by elements in Group 1
Positive
The type of bonds that typically form between two nonmetal atoms
In MgBr2, the small lower number two indicates there are two bromide ions for every one magnesium ion. The two is called a ____________.
Subscript
A shorter, easier way to show chemical reactions using symbols instead of words
Chemical Equation
The number in a chemical equation that tells you how many atoms or molecules of a reactant or product take part in a reaction
Coefficient
How many electrons can a Chlorine ion gain to form a stable compound?
One (1)
A bond involving two pairs of electrons shared between two atoms
Double Bond
The term for ions made of more than one atom.
Polyatomic Ions
The substances listed on the left side of a chemical equation
Reactants
The principle stating that during a chemical reaction, matter is not created or destroyed
Conservation of Mass
When you see Roman numerals with an element it indicates the elements _______. Example: Fe(II) or Fe(IV)
Oxidative State
The term used to describe a covalent bond where electrons are shared unequally
Polar
The correct chemical name for the compound with the formula Na2S
Sodium Sulfide
a type of Chemical Reaction where two or more simple substances (elements or compounds) combine to form a single, more complex product
Synthesis Reaction
A chemical reaction that gives off energy in the form of heat
Exothermic