zeolites
Only sodium and potassium are soft metals.
metals
It is a gas so it doesn't have a hardness unless in solid state
Yttrium has a Mohs hardness of about 5.5, making it relatively soft compared to many other metals.
Hardness is a characteristic that applies to a range of materials-metals and nonmetals alike- and is defined as the resistance of the material to deformation.
Their hardness will be less than that of metals but more than that of non metals. Hence the name, semi metals or metalloids.
Aluminum Oxide is roughly 8.5 - 9.0 on the hardness scale.
Zinc has a hardness of about 2.5 on the Mohs scale, which makes it relatively soft compared to other metals.
Metals are used for the production of screws as they are materials with high hardness and resistance to stress.
Hardness is a measure of a material's resistance to scratching or indentation. Common scales for measuring hardness include Mohs scale for minerals and Vickers scale for metals. Hardness can be influenced by factors such as composition, crystal structure, and temperature.
Americium hardness is likely not to have been measured.
Color, hardness, and texture