Question

name two elements which can be cut with a knife

Answer 1

Lithium, sodium and potassium are all soft metals that are easily cut with a scalpel or knife.

Answer 2

Answer:

Sodium and lithium

Solution:

Elements belongs to the group I in the periodic table as s-block alkali metals like lithium, sodium, rubidium, potassium, cesium, and francium are all very pulpy and can be cut with a knife. They are soft, shiny and silvery in appearance. Due to the presence of a single electron in their outermost shell held weakly to the nucleus, they drift far from the nucleus leading to larger atomic radii. This, in turn, results in weaker interatomic forces that make the alkali metals softer in nature. This weak interatomic force and large atomic radii, these metals also have low density and melting point.