A. sodium
B. iron
C. aluminum
D. lithium
Check Answer
The answer is A. Sodium.
sodium is the softest among the options given. Sodium has a very low hardness and can be easily cut with a knife. The other options (iron, aluminum, and lithium) are all harder than sodium.
sodium is the softest among the options given. Sodium has a very low hardness and can be easily cut with a knife. The other options (iron, aluminum, and lithium) are all harder than sodium.
