Compound
two or more elements whose atoms are chemically bonded
Chemical bond
Force that holds atoms together
Octet rule
8 valence electrons on the outermost energy level
Covalent Bond
bond where valence electrons are shared between atoms
Polar covalent bond
bond where one atom has a slightly stronger pool on the electrons than the other (Occurs between atoms of different elements)
Non-polar covalent bond
bond where both atoms equally share the electrons (occurs between atoms of the same element)
Ionic bond
bond where one atom loses electrons and the other gains electrons
Cation
atom that loses the electrons, has a positive charge
Anion
atom that gains the electrons, has a negative charge
Oxidation number
number of electrons that need to be lost or gained to achieve a full outer shell of valence electrons
Law of Conservation of Mass
in a chemical reaction mass is either created nor destroyed but transformed into new products
Chemical reaction
reaction where reactants are changed into new substance
Synthesis
to reactants react to become one product
Single replacement
an element and compound react to form a new compound in element
Double replacement
two compounds react to form two new compounds
Decomposition
a compound reacts to form two or more products
Combustion
a hydrocarbon and oxygen gas react to form water and carbon dioxide
to become more stable
Why do atoms bond?
covalent and ionic
What are two types of bonds?
two non-metals
Covalent bonds form between…
share
Atoms in a covalent bond….. electrons
weaker bonds, usually liquid or gas, etc
What are the properties of covalent compounds?
when ionic bonds are formed one atom loses electrons and one gained electrons forming ions
How are ions formed?
Metals
What type of elements are typically cations?
Nonmetals
what type of elements are typically a anions?
metals and non-metals
ionic bonds are formed between what types of elements?
oppositely charged
Ionic bonds are formed between… ions
Transferred
In ionic bonds, electrons are ….. between atoms
Antione Lavoisier
Who is the father of modern-day chemistry?
color change, formation of gas, temperature change, production of ador, formation of a precipitate (solid) production of light
How do you know a chemical reaction has occurred?
Synthesis, decomposition, single replacement, double replacement, and combustion
What are 5 types of reactions?