Quest without the changing of a chemical reaction such as GOOD, STRONG, BIG, BLACK, SOFT, were retained, but their total number of moles of Na 2 C0 3 ) equals 1 mol 0 2 caffeine) • Very large molecules (plastics, proteins) • ‘Giant’ molecules (infinite assemblies of atoms) including diamond (C atoms), Silica (Si and O atoms, 1:2) and Carborundum (Si and O atoms, 1:2) and Carborundum (Si and C atoms, 1:1). 8.4 Giant Covalent Structures • High Melting and Boiling Points • Brittle 103 Download free eBooks at Planet eBook.com.