Choose the answer which best describes what type of solid the compounds below form, in that order: NaOH, HCl, CaO, Sn?
1) Ionic solid, Covalent solid, Ionic solid, Metallic solid
2) Covalent solid, Ionic solid, Covalent solid, Metallic solid
3) Ionic solid, Ionic solid, Covalent solid, Metallic solid
4) Covalent solid, Covalent solid, Ionic solid, Metallic solid
