# 2.3 formulae and equations Flashcards

metals form _____ ions because they ______ electrons

metals from cations becuase they lose electrons

non metals form _____ ions because they ______ electrons

non metals form anions ions because they gain electrons

define a binary compound

contains only 2 elements

define polyatomic ions

ions that contain atoms of more than one element bonded together eg. hydroxide OH-

whats the formula and charge ammonium

NH4(+)

whats the formula and charge hydroxide

OH(-)

whats the formula and charge carbonate

CO3(2-)

whats the formula and charge nitrate

NO3(-)

whats the formula and charge nitrite

NO2(-)

whats the formula and charge hydrogen carbonate

HCO3(-)

whats the formula and charge sulfate

SO4(2-)

whats the formula and charge phosphate

PO4(3-)

whats the formula and charge dichromate

Cr2O7(2-)

whats the formula and charge hydrogen carbonate

HCO3(-)

whats the formula and charge thiosulfate

S2O3(2-)