a) Explain two ways that the periodic table is organized….

  а) Explаin twо wаys that the periоdic table is оrganized.   b) Explain the difference between ionic compounds and covalent compounds.   c) For each of the following pairs of elements, give the name of the compound formed, the chemical formula and the type of bond holding it together. i) Sodium and Sulfer ii) Calcium and Nitrogen iii) Oxygen and Fluorine iv) Nitrogen and Chlorine