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Mega
1Mm=10^6m
Kilo
1Km=10³m
Deci
1dm=10^-1m
Centi
1Cm=10^-2 m
Milli
1mm=10^-3
Micro
1u^=10^-6 m
Nano
1n^=10^-9 m
What zeros are not significant?
Leading and Trailing zeros
What zeros are significant
Captive zeros and Nonzero integers and Trailing zeros after the decimal point.
What charge are Anion ions
negative charge
What charge are Cation ions?
positively charged
Molecular Compounds
made only with nonmetal elements
Ionic Compounds
made with nonmetal and metal elements