27 terms

Chemical Bonds Test Ruppelt

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Terms in this set (...)

synthesis
creating something bigger/building
decomposition
separate/breaking down
single replacement (or displacement)
1 atom/molecule is replaced by another
double replacement (or displacement)
2 atoms/molecules are replaces by others
Law of Conservation of Mass
Mass in neither created nor destroyed

(mass of reactants must equal mass of products)
chemical change
change in chemical state and changes substance
physical change
change in physical state but stays the same substance
chemical reaction
the rearrangement of atoms to fill their octet (priority list)
Balancing Equations
1. Start w/ polyatomic ions if present
2. larger elements first
3. single elements last
hotter
Things react faster when they are _____________.
combustion
a reaction with oxygen (O2) that creates water (H2O) or carbon dioxide (CO2)
pure form of oxygen (O2) and H2O and/or CO2
combustion must have a ____________________________.
physical property
a property describing how/why something might change physically
chemical property
a property describing how/why something might change chemically
reactants
molecules you start with
products
ending molecules of the reactions
coefficients
number of molecules (placed before the whole molecule)
subscripts
how many atoms you have in a molecule, 2 or more (placed after the atom, small number)
element
one type of atom
compound
multiple elements
mixture
multiple molecules
covalent bond
atoms share electrons between two non-metals
ionic bond
atoms transfer electrons between a non-metal and metal
molecule
multiple atoms
polyatomic ion
multiple atoms with charges that bond
octet rule
predicts the way atoms tend to bond, atoms have to bond to have 8 valence electrons in the outer shell
Lewis Dot Diagrams
diagrams that show the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule
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