Atomic radius atomic number ionization energy and then electronegativity
I think the correct answers from the choices listed above are the first, third and the last option. Ionic compounds are compounds that dissociates into ions when in aqueous solution. From the list, NH4Cl, KF and MgO are the ionic compounds. Hope this answers the question.
You are right, it's CA Calcium, 40.08, Group 2 and Row 4.
Answer:
none of them are equal to one mole
