Which of the following elements lose two electrons when becoming an ion? (A) Barium
(B) Oxygen
(C) Flourine
(D) Sodium

Which is a characteristic of mixtures?

Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. a solution containing 3.50 g of sodium carbonate is mixed with one containing 5.00 g of silver nitrate. how many grams of sodium carbonate, silver nitrate, silver carbonate, and sodium nitrate are present after the reaction is complete?

How is the way a mixture is combined different from how a compound is combined?