Which of the following element pairs will most likely form an ionic bond?

100mg magnesium reacts with 20ml of 1.0m hcl

Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond. electronegativity difference of c and c: ionic covalent electronegativity difference of mg and cl: ionic covalent

What is calcium oxide+diphosphorus pentoxide--> calcium phosphate balanced