Test One – Chemistry Flashcard

Binary Ionic
Elements are far apart on table
Read left to right on periodic table
Positive ion first, negative ion second
First element unchanged, second element change ending to -ide
Ex: MgO KCl
Acids
Starts with H- (general formula is HX)
Binary- HCl, HF, HBr HI (Hydro__ic acid)
Ex: Sulfuric Acid
Molecular Compounds
Upper right of periodic table
Mono, di, tri, tetra, penta-, hexa-, hepta-, octa-, nona-, deca.
Ex. Carbon Monoxide
Transition Metals
Middle part of periodic table (all elements are cations-positively charged)
Use Roman Numerals to indicate charge.)
Ex. Iron(II) Chloride
Hydroxide
OH(-1)
Phosphate
PO4(-3)
Cyanide
CN(-)
Carbonate
CO3(-2)
Sulfate
SO4(-2)
Nitrate
NO3(-1)
Ammonium
NH(+1)
Nonzeros
all nonzeros are significant.
4421 has four sigfigs
zeros to the left
are never significant.
.0032 has two sigfigs
Zeros in the middle
are always significant.
302 has 3 sig figs
zeros to the right
are significant if there is a decimal
aren’t significant if there’s isn’t a decimal.
3200 has 2 sigfigs
3200. has 4 sigfigs
3200.00 has 6 sigfigs
adding or subtracting
answer may only have as many significant figures as the number with the fewest numbers to the right of the decimal
Ex. 2.1 + 4.9999 may only have two (as in 2.1) sig figs.

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