Chemistry Metal Reactivity

1. A chemical reaction category governed by the reactivity series rule, where a more reactive element successfully displaces or pushes out a less reactive metallic element from its salt solution or compound.
5. A dynamic corrosion prevention mechanism where a highly reactive metal (such as zinc) is intentionally paired with a less reactive metal (such as iron) so that the coating metal willingly undergoes decay and sacrifices itself to preserve the core structure.
7. The specific name of the green, protective chemical compound layer that develops over a copper surface as it slowly decays under prolonged exposure to moisture, oxygen, and carbon dioxide.
8. A permanent electrochemical surface-coating technique used to safeguard structural components against atmospheric decay by coating them specifically with a thin layer of protective aluminium.

2. The precise term given to a highly corrosive liquid mixture formulated by combining concentrated nitric acid with concentrated hydrochloric acid in a strict $1:3$ ratio, notable for being one of the few substances capable of dissolving otherwise unreactive noble metals.
3. A permanent chemical protection process defined specifically by coating an underlying iron surface with a layer of zinc to insulate the core metal from damp atmospheric exposure.
4. The thermodynamic classification given to chemical processes—such as the intense thermite reaction between aluminium powder and iron oxide powder—that release significant amounts of heat energy to their surroundings.
6. A permanent, expensive industrial preservation method where a metal is combined with other elements—such as combining iron with chromium and nickel to yield stainless steel—to permanently alter its structure and prevent chemical decay.