What is the independent variable of the penny lab

Which element forms an ionic bond with flourine? 1) fluorine 2) carbon 3) potassium 4) oxygen

Which of the following is described by the equation h2o(s)+ heat=h2o(i) a freezing melting condensing evaporating

1. true or false: minerals are inorganic. true false 2. inorganic means that something has never been found alive 3. halite is another name for and is a mineral with a cubic crystal pattern. table salt rock salt