Answer:
A)lithium
Step-by-step explanation:
Among the given options , lithium is the one of the soft element known .
Lithium -
It is a very soft element , denoted by the letters " Li " , the color of this metal is silver .
The position of lithium in the periodic table is in group 1 , period 2 .
the atomic number of Lithium =3 .
It is the lightest metal and at room temperature and pressure .