Which of the following does not form a diatomic molecule? chlorine copper nitrogen hydrogen

Consider the following system at equilibrium. caco3(s) ca2+(aq) + co32–(aq) the addition of which compound will cause a shift in equilibrium because of a common ion effect? ccl4 co2 cuso4 na2co3

Elements that do not have full outer electron shells will donate, share, or take electrons from other atoms. choose the items that have the correct binary ionic formula.

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.