New Answer: Malleability defined simply refers to a material's ability to deform under compressive stress. A thing that is then non-malleable is something that cannot be plastically deformed without fracturing.
You may find malleability referred to as ductility at times since the concepts of both malleability and ductility are similar.
Old Answer: the vast majority of non-metals.
Mercury is non-ductile and non-malleable, as it is a liquid.Lead is malleable but not ductile.
No, metals are generally malleable.
i only know that malleable means to sculp or shape
Neodymium is a hard, brittle metal and is classified as non-malleable because it does not exhibit malleability, which is the ability of a material to be hammered or rolled into thin sheets without breaking.
no
Gold is highly malleable and almost non-reactive.
yes
All non-metals are non malleable
argon is not malleable because it is not metal, non-metal elements can't be a malleable. but if it is metal or metalloids possibly it can be.
Xenon is a gas at STP. Gases are not malleable.
Metalloid
Non-metals.