The element that is highly malleable and almost non-reactive is gold (Au). Gold is a precious metal that is highly valued for its unique properties. It is extremely soft and malleable, allowing it to be easily shaped and molded into various forms. Additionally, gold is highly resistant to corrosion and tarnishing, making it almost non-reactive with most substances. This combination of properties makes gold highly sought after for jewelry, decorative purposes, and as a store of value.