What does he want? change into passive ​

Which is a chemical property of iron? a. it forms iron oxide (rust) when exposed to moisture and air. b. it is a gray–black metal that is hard to the touch. c. it has a melting point of 2795°f (1536°c). d. it is a good conductor of heat

Design techniques and materials that reduce the negative environmental impact of a structure are referred to as

Draw metallic bonding if two copper