7-1 Flashcards
chemical formula
tells relative # and kinds of atoms in a compound
molecular formula
of atoms in a single molecule
monoatomic ion
one atom ion
anion naming
change suffix to -ide
where are most anions found?
the right side because atoms want to gain electrons to become stable, which makes them negative
cation naming
same name as element
what happens when an element can form more than one ion?
they’re differentiated by Roman numerals
binary ionic compound
compound with ions of only two elements
what’s true of the charges for binary compounds?
total # of positive must equal total # of negative
binary compound naming
write name of cation then anion
empirical formula
smallest whole number ratio of ions in a compound
criss cross method
write symbols, listing cations first, put the charges above the atoms, then cross the charges as subscripts and reduce as necessary
oxyanions
polyatomic ions that contain oxygen
what’s true of oxyanions?
some elements react with oxygen to form multiple oxyanions
per -ate
one more oxygen than -ate
