5 Worksheets containing over 60 questions related to chemical bonding (ionic and colavent bonding) of metals and non metals,constructing electron arrangement, the structure of ionic compounds and covalent compounds (Lewis structure and atomic structure), the presence of ions and molecules, characteristics of giant covalent structures, the formation of isotopes, the chemical and physical characteristics of metals, ionic and covalent compounds (ability to conduct electricity in solid and liquid state, solubility in organic solvents and water, melting and boiling points). Worksheets suited for students in KS 4.