SOLAR SYSTEM

Detailed explanation-1: -Metal are defined as those element which posses luster, are malleable and ductile and good conductor of electricity.

Detailed explanation-2: -Silicon has a shiny luster, but it is brittle and conducts electricity poorly. Some metalloids change their characteristics when they react with different elements.

Detailed explanation-3: -Metals are lustrous because of the free electrons they have. The free electrons can move freely in the metal causing any light incident on them to get reflected back. This reflection is specular reflection rather than diffused and thus the metal surface appears shiny or lustrous .

Detailed explanation-4: -Gold and silver metals are some of the best malleable metals. Metals are ductile which means that metals can be drawn or stretched into thin wires. Gold is the most ductile metal. Metals are good conductors of heat: Silver is the best conductor of heat among all the metals.