Unit One- Chapter One and Two

list the meter measurements

DM, CM, MM, UM, NM, PM

list the grams measurements

G, DG, CG, MG, UG, NG, PG

how to find the atomic mass

(% abudance mass x mass amu) + (% abudance mass x mass amu)

negative charge on an atom

gain electrons

positive charge on an atom

lose elections

where does the atomic mass and the # of protons go in an isotope

Mass # is numerator

Proton # is denominator

cation

positive charge

anion

negative charge

molecular compound

formed from two or more nonmetallic elements

what do you do when a question asks for a chemical formula

cross ”multiply” the subscripts

what are the charges in total?

+1 , +2 , +3 , +4 , -3 , -2, - 1

what to do when you classify the following formula empirical or molecular formula

you divided by a common factor to try to get the subscript to the lowest value