18.3 Metals come from the earth's limited supply of ores Metallic bond is responsible for the high conductivity and high gross Fig18 14 metal ions are held together by freely flowing electrons These loose electrons form a kind of electronic fluid that flows through the lattice of positively charged ions18.3 Metals come from the Earth’s limited supply of ores Metallic bond is responsible for the high conductivity and high gross. Fig18.14 metal ions are held together by freely flowing electrons. These loose electrons form a kind of “electronic fluid” that flows through the lattice of positively charged ions