Yes, a typical property of metals is malleability.
Soft metal
It is a soft metal
Californium is a soft metal.
The hardness of alloys is very different; alloys have generally a hardness higher than the pure metal.
no
Hydrogen, at STP, is a gas. So under those conditions it could be called 'soft'.
Very probable francium is a soft metal.
Caesium is classified as a soft metal. It has a low melting point and can be easily cut with a knife.
Alkali metals in Group I.
Not really. A mallet is a kind of hammer, generally with a "soft" head (i.e. not metal but wood, rubber, or rawhide).
Sodium is considered a soft metal. It is malleable and easily cut with a knife.
A hard metal will act as an abrasive on a soft metal if they come in direct contact. The hard metal will cut grooves in the soft metal.