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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 |
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Starts with H- (general formula is HX)
Binary- HCl, HF, HBr HI (Hydro__ic acid)
Ex: Sulfuric Acid |
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Upper right of periodic table
Mono, di, tri, tetra, penta-, hexa-, hepta-, octa-, nona-, deca.
Ex. Carbon Monoxide |
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Middle part of periodic table (all elements are cations-positively charged)
Use Roman Numerals to indicate charge.)
Ex. Iron(II) Chloride |
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all nonzeros are significant.
4421 has four sigfigs |
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are never significant.
.0032 has two sigfigs |
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are always significant.
302 has 3 sig figs |
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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 |
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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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