round 5 of chem flashcards, we got this u guys :D
this unit is chucking a bunch of stuff at us, so I'm going to put some review cards so we don't forget some important lil details
yeah.
aight let's start where this unit started, what is an element?
a substance made from 1 type of atom
monoatomic
made of 1 atom
diatomic
made up of 2 atoms
polyatomic
made of many, many atoms
compound
2 or more elements that are chemically bonded
molecule
group of atoms that are ~covalently~ bonded
what kind of atom cannot be in a molecule?
a metal reminder: covalent bonding is only nonmetals. no forgetsies.
pOp QuiZ!
muahahaha
what do the little numbers in a chemical formula represent?
the amount of atoms of a certain element in a particle
what do the BIG numbers in a chemical formula represent?
the number of particles - also called a ~coefficient~
what do the letters in a chemical formula represent
the type of element
time for ur favvvvvv parttttt ->
~CHEMICAL REACTIONS~
WHAT IS COMBINATION/SYNTHESIS?
simple compounds -> complex ones
A + B -> AB
decomposition
~break it down~ complex compounds -> simple compounds AB -> A + B
single replacement
an atom tries to steal another atom's girl or if we wanna be profesh, one atom takes the place of another AX + B -> BX +A
BUT WAIT, what's special ab single replacement?
reaction only occurs if B is MORE REACTIVE than A CHECK REACTIVITY. CHECK IT. IF NOT, I WILL SUE.
double replacement
two atoms switchie places AX + BY -> AY + BX write the POSITIVE ION FIRST
combustion
hydrocarbon reacts w/ oxygen and goes boom, becoming carbon dioxide and agua or hydrocarbon reacts with oxygen gas in an ~exothermic~ reaction
time fo' special weshal decomposition
yeehaw
special decomposition - chlorate
Metal (A)Chlorate(B) → Metal (A) Chloride + O2 occurs if there is a metal and chlorate in the reactant of a chemical equation
special decomposition - hydroxide
element hydroxide -> element oxide + water
only applies if singular bond ends w/ hydroxide
special decomposition - carbonate
XCO3 -> XO + CO2
ionic compounds
what is the Law of Conservation of Matter/Mass?
MATTER CANNOT BE CREATED OR GO BOOM AND BYE (be destroyed), IT CAN ONLY CHANGE ITS FORM
OKAY there's some elements that are a little funky and have 2 or more atoms when by themself, what are they?
Sir S.P. BrINClHOF
(Sulfur 8, Phosphorous 4, Bromine 2, Iodine 2, Nitrogen 2, Chlorine 2, Hydrogen 2, Oxygen 2, Fluorine 2)
predict the products then write and balance the following equations
mhm
calcium carbonate
combustion of C12H26 (the numbers are supposed to be subscripts)
Iron (II) Chloride + Sodium Phosphate ->
congrats ur at the end, check the resource page for practice :)