Which element, when combined with phosphorus, would form ionic compound? A) Carbon
B)Oxygen
C)Magnesium
D)Boron

Explanation:

Magnesium Phosphide has a formula of Mg3P2 . In order to bond ionically the charges must be equal and opposite. It will take two -3 phosphide ions to balance two +2 magnesium ions forming a magnesium phosphide molecule of Mg3P2 . I hope this was helpful.

Explanation:

Magnesium is a light silver-white ductile bivalent metallic element; in pure form it burns with brilliant white flame; it occurs naturally only in combination as in magnesite and dolomite and carnallite and spinel and olivine.

Dolomite is a light colored mineral consisting of calcium magnesium carbonate; a source of magnesium; used as a ceramic and as a fertilizer.

So, the final answer is c. magnesium.

c is the answer because when something is left after something evaporates that shows the chemical change.

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current